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Pahuja A, Dhiman R, Aggarwal V, Aalok SP, Saxena R. Evaluation of Peripapillary and Macular Optical Coherence Tomography Angiography Characteristics in Different Stages of Papilledema. J Neuroophthalmol 2024; 44:53-60. [PMID: 37364246 DOI: 10.1097/wno.0000000000001908] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
BACKGROUND Prospective evaluation of optical coherence tomography (OCT) and OCT angiography (OCT-A) characteristics in different stages of papilledema in idiopathic intracranial hypertension (IIH). METHODS In this prospective, observational study patients of IIH with papilledema were recruited and divided into 3 groups-early/established (Group 1), chronic (Group 2), and atrophic papilledema (Group 3). Peripapillary retinal nerve fiber layer (RNFL) and macular ganglion cell inner plexiform layer (GC-IPL) were recorded on OCT. Peripapillary and macular perfusion was documented at superficial retinal, deep retinal, and choriocapillary level using OCT-A. The investigations were repeated at 3 months. RESULTS RNFL showed significant thinning in all groups on follow-up with the atrophic group showing maximum thinning ( P = 0.01-Group 3). GC-IPL was significantly reduced in all stages of papilledema at baseline compared with the controls. Thinnest GC-IPL was noted in the atrophic group (52.75 ± 7.44 μm; P = 0.00 in Group 3 vs controls) that showed further deterioration on follow-up. On Image J analysis, significant decrease was noted at various levels in the peripapillary and macular perfusion at baseline especially in the atrophic group which showed further deterioration noted on follow-up. The final visual acuity showed a statistically significant weak negative correlation with baseline RNFL (r = -0.306) and GC-IPL (r = -0.384) and moderately negative correlation with baseline superficial peripapillary retinal perfusion (r = -0.553). A significant negative correlation was seen between increasing grade of papilledema and superficial peripapillary retinal perfusion with both Image J and automated indices (r = -0.46; r = -0.61), respectively. CONCLUSIONS GC-IPL may help identify early damage in papilledema even in the presence of thicker RNFL. Significant vascular changes can be observed on OCT-A that may help predict the final visual outcome in papilledema due to IIH.
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Affiliation(s)
- Akshra Pahuja
- Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
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Majmudar TV, Moss HE, Avery RA. Which OCT Measure of the Optic Nerve Head Improves Fastest? Towards Optimizing Early Detection of Resolving Papilledema in Children. Transl Vis Sci Technol 2024; 13:12. [PMID: 38224329 PMCID: PMC10793388 DOI: 10.1167/tvst.13.1.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/30/2023] [Indexed: 01/16/2024] Open
Abstract
Purpose Optical coherence tomography (OCT) has been used to monitor papilledema. This study aims to determine which OCT-derived measures of the optic nerve head (ONH) detect resolving papilledema in children faster than standard OCT measures. Methods Children (≤18 years of age) with papilledema who completed optic nerve SD-OCT pretreatment and had evidence of treatment response on one or more follow-up OCTs within 4 months were included. Standard (mean circumpapillary retinal nerve fiber layer [cpRNFL] thickness), device-derived (per-quadrant cpRNFL) and custom (ONH height, maximum Bruch's membrane displacement [BMD], ONH volume [ONHV], and BMD volume) OCT measures were calculated. Per-eye generalized estimating equations (GEEs) modelled changes in device-derived and custom measures as a function of mean cpRNFL to identify those measures that resolved faster during early (0-2 months) follow-up. Mean cpRNFL coefficients of greater than 1 indicated faster resolving papilledema. Results We included 52 eyes of 29 children (mean age, 12.8 years; 72.4% female). In analysis of early follow-up visits (38 eyes from 22 children), nasal cpRNFL and maximum BMD in each quadrant resolved faster than mean cpRNFL (GEE coefficients range, 1.14-3.37). Inferior cpRNFL, superior, nasal, and inferior ONH heights and ONHV resolved slower than mean cpRNFL (GEE coefficients range, 0.67-0.87). Conclusions Nasal cpRNFL is a promising device-derived OCT measure for the early detection of resolving papilledema in children compared with mean cpRNFL. Maximum BMD, a custom measure, also shows promise, but its calculation has not yet been incorporated into commercial OCT devices. Translational Relevance This study guides the optimal use of OCT in capturing resolving papilledema in children.
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Affiliation(s)
| | - Heather E. Moss
- Department of Ophthalmology, Stanford University, Palo Alto, CA, USA
- Department of Neurology and Neurological Sciences, Stanford University, Palo Alto, CA, USA
| | - Robert A. Avery
- Divison of Ophthalmology, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
- Department of Ophthalmology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
- Department of Neurology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
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Bassi ST, Pamu R, Varghese A. Understanding pseudopapilledema on spectral domain optical coherence tomography. Indian J Ophthalmol 2023; 71:3552-3557. [PMID: 37870023 PMCID: PMC10752308 DOI: 10.4103/ijo.ijo_3146_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 05/29/2023] [Accepted: 06/17/2023] [Indexed: 10/24/2023] Open
Abstract
Purpose Optic nerve head drusen (ONHD), peripapillary hyperreflective ovoid mass-like structures (PHOMS), and horizontal hyperreflective lines (HHL) are commonly seen in eyes with pseudopapilledema on enhanced depth imaging (EDI) spectral domain optical coherence tomography (SDOCT). The objective of this study is to assess the frequency of ONHD, PHOMS, and HHL on spectral domain OCT in the eyes diagnosed to have pseudopapilledema. Methods A retrospective case-control study included patients diagnosed as pseudopapilledema and had EDI SD OCT imaging of the optic nerve head (n = 48 eyes) and controls (n = 20 eyes). OCT scans through the optic nerve head were studied to diagnose ONHD, HHL, and PHOMS. One proportion z test was used to find the difference in proportions. Results Forty eight eyes of 27 subjects were studied. ONHD as described by the optic disc drusen Studies consortium was noted in 19 eyes (39.48%), P value-0.032, PHOMS in 31 eyes (64.6%), P value 0.043, HL in 19 eyes (39.48%), P value 0.032, and none of the normals had ONHD, PHOMS, and HHL. Conclusions PHOMS are more frequently seen than ONHD and HHL in eyes with pseudopapilledema.
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Affiliation(s)
- Shikha Talwar Bassi
- Neuroophthalmology Services, Sankara Nethralaya, 18 College Road, Chennai, Tamil Nadu, India
| | - Ramesh Pamu
- Comprehensive Ophthalmology, Neuroophthalmology Services, Sankara Nethralaya, 18 College Road, Chennai, Tamil Nadu, India
| | - Anjaly Varghese
- Department of Optometry, Sankara Nethralaya, 18 College Road, Chennai, Tamil Nadu, India
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Girard MJA, Panda S, Tun TA, Wibroe EA, Najjar RP, Aung T, Thiéry AH, Hamann S, Fraser C, Milea D. Discriminating Between Papilledema and Optic Disc Drusen Using 3D Structural Analysis of the Optic Nerve Head. Neurology 2023; 100:e192-e202. [PMID: 36175153 DOI: 10.1212/wnl.0000000000201350] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 08/19/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND AND OBJECTIVES The distinction of papilledema from other optic nerve head (ONH) lesions mimicking papilledema, such as optic disc drusen (ODD), can be difficult in clinical practice. We aimed the following: (1) to develop a deep learning algorithm to automatically identify major structures of the ONH in 3-dimensional (3D) optical coherence tomography (OCT) scans and (2) to exploit such information to robustly differentiate among ODD, papilledema, and healthy ONHs. METHODS This was a cross-sectional comparative study of patients from 3 sites (Singapore, Denmark, and Australia) with confirmed ODD, those with papilledema due to raised intracranial pressure, and healthy controls. Raster scans of the ONH were acquired using OCT imaging and then processed to improve deep-tissue visibility. First, a deep learning algorithm was developed to identify major ONH tissues and ODD regions. The performance of our algorithm was assessed using the Dice coefficient. Second, a classification algorithm (random forest) was designed to perform 3-class classifications (1: ODD, 2: papilledema, and 3: healthy ONHs) strictly from their drusen and prelamina swelling scores (calculated from the segmentations). To assess performance, we reported the area under the receiver operating characteristic curve for each class. RESULTS A total of 241 patients (256 imaged ONHs, including 105 ODD, 51 papilledema, and 100 healthy ONHs) were retrospectively included in this study. Using OCT images of the ONH, our segmentation algorithm was able to isolate neural and connective tissues and ODD regions/conglomerates whenever present. This was confirmed by an averaged Dice coefficient of 0.93 ± 0.03 on the test set, corresponding to good segmentation performance. Classification was achieved with high AUCs, that is, 0.99 ± 0.001 for the detection of ODD, 0.99 ± 0.005 for the detection of papilledema, and 0.98 ± 0.01 for the detection of healthy ONHs. DISCUSSION Our artificial intelligence approach can discriminate ODD from papilledema, strictly using a single OCT scan of the ONH. Our classification performance was very good in the studied population, with the caveat that validation in a much larger population is warranted. Our approach may have the potential to establish OCT imaging as one of the mainstays of diagnostic imaging for ONH disorders in neuro-ophthalmology, in addition to fundus photography.
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Affiliation(s)
- Michaël J A Girard
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia.
| | - Satish Panda
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Tin Aung Tun
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Elisabeth A Wibroe
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Raymond P Najjar
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Tin Aung
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Alexandre H Thiéry
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Steffen Hamann
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Clare Fraser
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
| | - Dan Milea
- From the Ophthalmic Engineering & Innovation Laboratory (M.J.A.G., S.P.), Singapore Eye Research Institute (T.A.T., R.P.N., T.A., D.M.), Singapore National Eye Centre; Duke-NUS Graduate Medical School (M.J.A.G., T.A.T., R.P.N., T.A., D.M.), Singapore; Institute for Molecular and Clinical Ophthalmology (M.J.A.G.), Basel, Switzerland; Department of Ophthalmology (E.A.W., S.H.), Rigshospitalet, University of Copenhagen, Denmark; Yong Loo Lin School of Medicine (R.P.N., T.A.), and Department of Statistics and Applied Probability (A.H.T.), National University of Singapore; and Save Sight Institute (C.F.), Faculty of Health and Medicine, The University of Sydney, New South Wales, Australia
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Pramil V, Tam M, Vuong LN, Hedges TR. Upper Limit of Retinal Nerve Fibre Layer Thickness in Patients with Pseudopapilloedema. Neuroophthalmology 2022; 46:390-398. [PMID: 36544585 PMCID: PMC9762780 DOI: 10.1080/01658107.2022.2116458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/27/2022] [Accepted: 08/09/2022] [Indexed: 12/24/2022] Open
Abstract
An initial misdiagnosis of papilloedema in a patient with optic nerve head swelling can be anxiety-provoking and may result in unnecessary, invasive, and costly tests. Cirrus high definition, spectral domain-optical coherence tomography (Cirrus HD-OCT) may provide a rapid and non-invasive test. We sought to determine an upper limit of average retinal nerve fibre layer (RNFL) thickness in patients with pseudopapilloedema without visible drusen using Cirrus HD-OCT that could be utilised in conjunction with the clinical presentation and physical examination when managing patients with optic nerve head swelling. Inclusion criteria consisted of at least two neuro-ophthalmological visits and repeated imaging of the optic nerve head with Cirrus HD-OCT at least 6 months apart. Exclusion criteria included clinically visible drusen along with previous or concomitant diagnosis of retinal or other optic nerve pathology. Thirty-eight eyes from 19 patients with pseudopapilloedema were included in this study. The upper limit of average RNFL thickness was defined as two standard deviations above the mean of the average RNFL thickness and was calculated to be 158.65 µm for scans obtained with Cirrus HD-OCT devices. A patient with suspected optic nerve head swelling, an average RNFL thickness less than 158.65 µm, and no other evidence of papilloedema or neurological signs or symptoms can be managed with serial follow-ups with OCT imaging for at least 6 months. If the patient continues to have no clinical symptoms suggesting increased intracranial pressure and the average RNFL thickness is stable, the likelihood of papilloedema is minimal.
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Affiliation(s)
- Varsha Pramil
- Tufts University School of Medicine, Boston, Massachusetts, USA
- New England Eye Center, Tufts New England Medical Center, Boston, Massachusetts, USA
| | - Mary Tam
- Department of Ophthalmology, Stony Brook University Hospital, Stony Brook, New York, USA
| | - Laurel N. Vuong
- Tufts University School of Medicine, Boston, Massachusetts, USA
- New England Eye Center, Tufts New England Medical Center, Boston, Massachusetts, USA
| | - Thomas R. Hedges
- Tufts University School of Medicine, Boston, Massachusetts, USA
- New England Eye Center, Tufts New England Medical Center, Boston, Massachusetts, USA
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Farazdaghi MK, Trimboli-Heidler C, Liu GT, Garcia A, Ying GS, Avery RA. Utility of Ultrasound and Optical Coherence Tomography in Differentiating Between Papilledema and Pseudopapilledema in Children. J Neuroophthalmol 2021; 41:488-495. [PMID: 33870950 PMCID: PMC8514567 DOI: 10.1097/wno.0000000000001248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Differentiating between papilledema and pseudopapilledema in children presenting with mild-to-moderate optic nerve head elevation is challenging. This study sought to determine which B-scan ultrasonography (BSUS) and optical coherence tomography (OCT) features, individually or in combination, are best able to differentiate between papilledema and pseudopapilledema in children. METHODS Children presenting with optic nerve head elevation of unknown etiology were eligible if they underwent BSUS and OCT performed by the same investigator. The absolute optic nerve sheath diameter (in millimeter) along with the presence/absence of a hyperreflective nodule(s) at the optic nerve head (indicative of druse) from BSUS was determined. The average circumpapillary retinal nerve fiber layer (cpRNFL), diameter of Bruch membrane opening, maximum papillary height, and the presence/absence of hyper-/hyporeflective lesions at the optic nerve head were calculated. Sensitivity and specificity were calculated to evaluate which BSUS and OCT imaging features, individually and in combination, accurately classified children as having papilledema vs pseudopapilledema. RESULTS One hundred eighty-one eyes from 94 children (mean age, 11.0 years; range, 3.2-17.9) were included; 36 eyes with papilledema and 145 eyes with pseudopapilledema. Among BSUS features, optic nerve sheath widening (>4.5 mm) demonstrated the best sensitivity (86%; 95% confidence interval [CI], 64%-96%) and specificity (88%; 95% CI, 79%-94%) for papilledema. Among OCT measures, cpRNFL thickness of ≥140 µm demonstrated the best sensitivity (83%; 95% CI, 66%-93%) and specificity (76%; 95% CI, 66%-84%) to identify papilledema. The presence of both optic nerve sheath widening (>4.5 mm) and cpRNFL thickness of ≥140 µm reduced the sensitivity (72%; 95% CI, 52%-86%) but increased specificity (95%; 95% CI, 88%-98%). CONCLUSION BSUS (optic nerve sheath widening [>4.5 mm]) and OCT (cpRNFL thickness ≥140 µm), individually and collectively, have good diagnostic accuracy for differentiating between papilledema and pseudopapilledema. The presence of druse does not exclude the diagnosis of papilledema.
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Affiliation(s)
- Marybeth K. Farazdaghi
- Division of Ophthalmology, The Children’s Hospital of Philadelphia
- Department of Ophthalmology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | | | - Grant T. Liu
- Division of Ophthalmology, The Children’s Hospital of Philadelphia
- Department of Neurology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Arielle Garcia
- Division of Ophthalmology, The Children’s Hospital of Philadelphia
| | - Gui-Shuang Ying
- Department of Ophthalmology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Robert A. Avery
- Division of Ophthalmology, The Children’s Hospital of Philadelphia
- Department of Neurology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
- Department of Ophthalmology, The Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
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Xie JS, Donaldson L, Margolin E. Papilledema: A review of etiology, pathophysiology, diagnosis, and management. Surv Ophthalmol 2021; 67:1135-1159. [PMID: 34813854 DOI: 10.1016/j.survophthal.2021.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 11/05/2021] [Accepted: 11/15/2021] [Indexed: 02/06/2023]
Abstract
Papilledema is optic nerve head edema secondary to raised intracranial pressure (ICP). It is distinct from other causes of optic disk edema in that visual function is usually normal in the acute phase. Papilledema is caused by transmission of elevated ICP to the subarachnoid space surrounding the optic nerve that hinders axoplasmic transport within ganglion cell axons. There is ongoing controversy as to whether axoplasmic flow stasis is produced by physical compression of axons or microvascular ischemia. The most common cause of papilledema, especially in patients under the age of 50, is idiopathic intracranial hypertension (IIH); however, conditions that decrease cerebrospinal fluid (CSF) outflow by either causing CSF derangements or mechanically blocking CSF outflow channels, and rarely conditions that increase CSF production, can be the culprit. When papilledema is suspected clinically, blood pressure should be measured, and pseudopapilledema should be ruled out. Magnetic resonance imaging of the brain and orbits with venography sequences is the preferred neuroimaging modality that should be performed next to look for indirect imaging signs of increased ICP and to rule out nonidiopathic causes. Lumbar puncture with measurement of opening pressure and evaluation of CSF composition should then be performed. In patients not in a typical demographic group for IIH, further investigations should be conducted to assess for underlying causes of increased ICP. Magnetic resonance imaging of the neck and spine, magnetic resonance angiography of the brain, computed tomography of the chest, complete blood count, and creatinine testing should be able to identify most secondary causes of intracranial hypertension. Treatment for patients with papilledema should be targeted toward the underlying etiology. Most patients with IIH respond to weight loss and oral acetazolamide. For patients with decreased central acuity and constricted visual fields at presentation, as well as patients who do not respond to treatment with acetazolamide, surgical treatments should be considered, with ventriculoperitoneal shunting being the typical procedure of choice.
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Affiliation(s)
- Jim Shenchu Xie
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Laura Donaldson
- Faculty of Medicine, Department of Ophthalmology and Visual Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Edward Margolin
- Faculty of Medicine, Department of Ophthalmology and Visual Sciences, University of Toronto, Toronto, Ontario, Canada; Faculty of Medicine, Department of Medicine, Division of Neurology, University of Toronto, Toronto, Ontario, Canada.
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Lo C, Vuong LN, Micieli JA. Recent advances and future directions on the use of optical coherence tomography in neuro-ophthalmology. Taiwan J Ophthalmol 2021; 11:3-15. [PMID: 33767951 PMCID: PMC7971436 DOI: 10.4103/tjo.tjo_76_20] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 09/26/2020] [Indexed: 12/12/2022] Open
Abstract
Optical coherence tomography (OCT) is a noninvasive imaging technique used to qualitatively and quantitatively analyze various layers of the retina. OCT of the retinal nerve fiber layer (RNFL) and ganglion cell-inner plexiform layer (GCIPL) is particularly useful in neuro-ophthalmology for the evaluation of patients with optic neuropathies and retrochiasmal visual pathway disorders. OCT allows for an objective quantification of edema and atrophy of the RNFL and GCIPL, which may be evident before obvious clinical signs and visual dysfunction develop. Enhanced depth imaging OCT allows for visualization of deep structures of the optic nerve and has emerged as the gold standard for the detection of optic disc drusen. In the evaluation of compressive optic neuropathies, OCT RNFL and GCIPL thicknesses have been established as the most important visual prognostic factor. There is increasing evidence that inclusion of OCT as part of the diagnostic criteria for multiple sclerosis (MS) increases its sensitivity. Moreover, OCT of the RNFL and GCIPL may be helpful in the early detection and monitoring the treatment of conditions such as MS and Alzheimer's disease. OCT is an important aspect of the neuro-ophthalmologic assessment and its use is likely to increase moving forward.
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Affiliation(s)
- Cody Lo
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Laurel N. Vuong
- The New England Eye Center, Tufts Medical Center, Boston, MA, USA
| | - Jonathan A. Micieli
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON, Canada
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Yadegari S, Gholizade A, Ghahvehchian H, Aghsaei Fard M. Effect of phenytoin on retinal ganglion cells in acute isolated optic neuritis. Neurol Sci 2020; 41:2477-2483. [PMID: 32212009 DOI: 10.1007/s10072-020-04360-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/16/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Phenytoin has been shown to reduce the peripapillary retinal nerve fiber layer (pRNFL) loss in optic neuritis (ON). We evaluated the effects of phenytoin on retinal ganglion layers and visual outcomes of newly diagnosed acute ON. METHODS A randomized, placebo-controlled trial was conducted in a tertiary referral eye hospital and patients with the first episode of typical demyelinating ON, without any history of multiple sclerosis were randomly assigned to phenytoin or placebo. The thickness of ganglion cell-inner plexiform layer (GCIPL) measured by optical coherence tomography (OCT) was considered as the primary outcome. RESULTS One patient in the phenytoin group developed severe cutaneous rashes that progressed to Stevens-Johnson syndrome (SJS)/toxic epidermal necrosis (TEN), and further allocation of patients to the phenytoin group was stopped, and finally fifteen participants were included in the phenytoin group. Fifty-one patients were enrolled to the placebo group, from which four were excluded. Both visual acuity and field were not significantly different between the control and phenytoin groups after 1 and 6 months. Mean 3- and 6-mm macular GCIPL thicknesses decreased after 6 months to 73.6 ± 14.1 and 57.9 ± 7.5 μm, respectively, in the phenytoin group and to 71.6 ± 15.7 and 55.6 ± 6.6 μm, respectively, in the placebo group with no significant differences between the two groups (P = 0.77 and P = 0.26, respectively, linear multilevel model). CONCLUSION Phenytoin is not probably safe and effective as neuroprotection after acute ON. Further investigation with other sodium channel inhibitors could be considered.
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Affiliation(s)
- Samira Yadegari
- Farabi Eye Hospital, Tehran University of Medical science, Qazvin Sq, Tehran, Iran
| | - Alireza Gholizade
- Farabi Eye Hospital, Tehran University of Medical science, Qazvin Sq, Tehran, Iran
| | - Hossein Ghahvehchian
- Farabi Eye Hospital, Tehran University of Medical science, Qazvin Sq, Tehran, Iran
| | - Masoud Aghsaei Fard
- Farabi Eye Hospital, Tehran University of Medical science, Qazvin Sq, Tehran, Iran.
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10
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Fard MA, Golizadeh A, Yadegari S, Ghahvehchian H, Subramanian P, Ritch R. Photoreceptor outer nuclear layer thickness changes in optic neuritis follow up. Mult Scler Relat Disord 2019; 39:101905. [PMID: 31884384 DOI: 10.1016/j.msard.2019.101905] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 12/01/2019] [Accepted: 12/19/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Ganglion cell inner plexiform (GCIP) layer thinning following acute optic neuritis (ON) is well-known. However, the onset of changes in the outer retinal layers needs further study. In this study, we determine longitudinal changes in retinal layer thickness in ON. METHODS Thirty ON patients underwent optical coherence tomography (OCT) and visual function testing at baseline, one month, and 6 months. RESULTS Mean GCIPL thickness decreased at one month relative to baseline from 63.6 ± 7.5 μm to 57.3 ± 6.8 µm in 3 mm ring (P < 0.001). There were no significant changes in GCIPL thickness between one and 6 months (P = 0.42). Outer nuclear layer (ONL) thickness in the 6 mm macular area increased from 58.9 ± 5.8 µm to 63.2 ± 6.8 μm at one month (P < 0.001) and then decreased at six month (58.8 ± 5.8 µm) relative to one month, reaching the baseline thickness. While GCIPL thinning at 1 month correlated with baseline visual acuity, change in the central ONL thickness from baseline to month 1 predicted visual outcome at month 6 (r = 0.6, P = 0.001). CONCLUSIONS Following ON, transient changes occur in the photoreceptor nuclei layer and then revert to baseline. This finding could predict 6 month visual acuity after ON.
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Affiliation(s)
| | - Alireza Golizadeh
- Farabi Eye Hospital, Tehran University of Medical science, Tehran, Iran
| | - Samira Yadegari
- Farabi Eye Hospital, Tehran University of Medical science, Tehran, Iran
| | | | - Prem Subramanian
- Department of Ophthalmology, Neurology, and Neurosurgery, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Robert Ritch
- Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
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11
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Ahn JM, Kim S, Ahn KS, Cho SH, Kim US. Accuracy of machine learning for differentiation between optic neuropathies and pseudopapilledema. BMC Ophthalmol 2019; 19:178. [PMID: 31399077 PMCID: PMC6688269 DOI: 10.1186/s12886-019-1184-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 07/29/2019] [Indexed: 11/25/2022] Open
Abstract
Background This study is to evaluate the accuracy of machine learning for differentiation between optic neuropathies, pseudopapilledema (PPE) and normals. Methods Two hundred and ninety-five images of optic neuropathies, 295 images of PPE, and 779 control images were used. Pseudopapilledema was defined as follows: cases with elevated optic nerve head and blurred disc margin, with normal visual acuity (> 0.8 Snellen visual acuity), visual field, color vision, and pupillary reflex. The optic neuropathy group included cases of ischemic optic neuropathy (177), optic neuritis (48), diabetic optic neuropathy (17), papilledema (22), and retinal disorders (31). We compared four machine learning classifiers (our model, GoogleNet Inception v3, 19-layer Very Deep Convolution Network from Visual Geometry group (VGG), and 50-layer Deep Residual Learning (ResNet)). Accuracy and area under receiver operating characteristic curve (AUROC) were analyzed. Results The accuracy of machine learning classifiers ranged from 95.89 to 98.63% (our model: 95.89%, Inception V3: 96.45%, ResNet: 98.63%, and VGG: 96.80%). A high AUROC score was noted in both ResNet and VGG (0.999). Conclusions Machine learning techniques can be combined with fundus photography as an effective approach to distinguish between PPE and elevated optic disc associated with optic neuropathies.
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Affiliation(s)
- Jin Mo Ahn
- Department of Bioinformatics and Life Science, Soongsil University, Seoul, South Korea
| | - Sangsoo Kim
- Department of Bioinformatics and Life Science, Soongsil University, Seoul, South Korea
| | - Kwang-Sung Ahn
- Functional Genome Institute, PDXen Biosystems Inc, Seoul, Republic of Korea
| | - Sung-Hoon Cho
- Functional Genome Institute, PDXen Biosystems Inc, Seoul, Republic of Korea
| | - Ungsoo S Kim
- Department of Ophthalmology, Kim's Eye Hospital, Youngshin-ro 136, Youngdeungpo-gu, Seoul, 150-034, South Korea.
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12
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Patel MD, Malhotra K, Shirazi Z, Moss HE. Methods for Quantifying Optic Disc Volume and Peripapillary Deflection Volume Using Radial Optical Coherence Tomography Scans and Association With Intracranial Pressure. Front Neurol 2019; 10:798. [PMID: 31396151 PMCID: PMC6668216 DOI: 10.3389/fneur.2019.00798] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 07/10/2019] [Indexed: 11/17/2022] Open
Abstract
Purpose: Papilledema and peripapillary deformation of Bruch's membrane (BM) are associated with elevated intracranial pressure (ICP). We have developed a novel methodology to measure these parameters using a radial optical coherence tomography (OCT) scan pattern and apply this to test the hypothesis that ICP is associated with volumetric features of ophthalmic structures. Methods: 6-radial OCT B-scans centered over the optic nerve head were acquired in 17 subjects (30 eyes) before lumbar puncture with measurement of ICP (range: 10–55 cm H2O). Internal limiting membrane (ILM) and BM were segmented. Three definitions of BM were studied to account for imaging artifact affecting peripapillary BM: connecting rater-identified BM margins(traditional), connecting rater-identified BM 1.6 mm on either side of the ONH(estimated), and excluding BM in the central 3.2 mm of the images(excluded). Optic nerve head volume (ONHV), BM displacement volume (BMDV) and cup volume (CV) were calculated by interpolating between B-scans. Ganglion cell complex volume (GCCV) was measured in the macula. Linear generalized estimating equations (GEE) modeled ONVH, BMDV, and CV as a function of ICP and GCCV. Results: Increased ONHV was associated with elevated ICP for traditional (p = 0.006), estimated (p = 0.003) and excluded (p = 0.05) BM definitions. Decreased BMDV was associated with elevated ICP for traditional (p < 0.0005), estimated (p < 0.0005) and excluded (p = 0.001) definitions. Decreased ONHV was independently associated with decreased GCCV (p = 0.001) and decreased ICP (p = 0.031) in multivariable models. CV was neither associated with ICP nor GCCV in univariate or multivariable models. Conclusions: Elevated ICP is associated with ONHV increase and BMDV decrease, calculated from OCT images accounting for image artifact. Ganglion cell atrophy affects the relationship between ICP and ONHV. OCT derived volumetric measures of the posterior eye may have application as biomarkers for elevated ICP.
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Affiliation(s)
- Megh Dipak Patel
- Department of Ophthalmology, Stanford University, Palo Alto, CA, United States
| | - Kiran Malhotra
- Department of Ophthalmology and Visual Sciences, University of Illinois College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Zainab Shirazi
- Department of Ophthalmology and Visual Sciences, University of Illinois College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Heather E Moss
- Department of Ophthalmology, Stanford University, Palo Alto, CA, United States.,Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, United States
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13
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Fard MA, Sahraiyan A, Jalili J, Hejazi M, Suwan Y, Ritch R, Subramanian PS. Optical Coherence Tomography Angiography in Papilledema Compared With Pseudopapilledema. Invest Ophthalmol Vis Sci 2019; 60:168-175. [PMID: 30640969 PMCID: PMC6333108 DOI: 10.1167/iovs.18-25453] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 11/25/2018] [Indexed: 11/24/2022] Open
Abstract
Purpose The purpose of this study is to evaluate differences in optical coherence tomography angiography (OCT-A) findings between patients with papilledema and pseudopapilledema. Methods In this prospective, comparative study, 41 eyes of 21 subjects with papilledema, 27 eyes of 15 subjects with pseudopapilledema, and 44 eyes of 44 healthy normal subjects were included and were imaged using OCT-A. In addition to peripapillary total vasculature maps obtained with commercial vessel density mapping, major vessel removal using customized image analysis software was also used to measure whole image capillary density and peripapillary capillary density (PCD). Peripapiilary retinal nerve fiber layer (RNFL) and macular ganglion cell complex (GCC) were recorded. Results Average RNFL thicknesses were greater in papilledema eyes than in pseudopapilledema and control subjects. GCC thickness was not different among three groups. Peripapillary vasculature values were significantly lower in papilledema (58.5 ± 6.1%) and pseudopapilledema (58.9 ± 4.7%) eyes compared with healthy eyes (63.2 ± 3.1%) using commercial machine software, without a difference between papilledema and pseudopapilledema eyes. However, using our customized software, peripapillary "capillary" density of papilledema eyes was 29.8 ± 9.4%, which was not significantly different from healthy subjects (31.8 ± 7.4%; P = 0.94). Pseudopapilledema eyes with peripapillary density of 25.5 ± 8.3% had significantly lower capillary values compared with control eyes (P = 0.01). There was a significantly lower whole image and nasal sector peripapillary capillary density of inner retina in pseudopapilledema eyes than papilledema eyes (P = 0.03 and P = 0.02, respectively). Conclusions Whole image and nasal peripapillary sector capillary densities using OCT-A had diagnostic accuracy for differentiating true and pseudo-disc swelling.
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Affiliation(s)
| | - Alireza Sahraiyan
- Farabi Eye Hospital, Tehran University of Medical Science, Tehran, Iran
| | - Jalil Jalili
- Department of Medical Physics and Biomedical Engineering, Research Center for Molecular and Cellular in Imaging, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Marjane Hejazi
- Department of Medical Physics and Biomedical Engineering, Research Center for Molecular and Cellular in Imaging, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Yanin Suwan
- Department of Ophthalmology, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Robert Ritch
- Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, New York, United States
| | - Prem S. Subramanian
- Department of Ophthalmology, University of Colorado, School of Medicine, Aurora, Colorado, United States
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Fard MA, Ghahvechian H, Sahrayan A, Subramanian PS. Early Macular Vessel Density Loss in Acute Ischemic Optic Neuropathy Compared to Papilledema: Implications for Pathogenesis. Transl Vis Sci Technol 2018; 7:10. [PMID: 30271677 PMCID: PMC6159734 DOI: 10.1167/tvst.7.5.10] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 08/01/2018] [Indexed: 11/28/2022] Open
Abstract
PURPOSE This study compares macular and parafoveal vasculature in patients with optic disc swelling. METHODS Twenty eyes with acute nonarteritic anterior ischemic optic neuropathy (NAION), 39 eyes with papilledema at first presentation, and 22 eyes of normal subjects were imaged using optical coherence tomography angiography (OCT-A). Macular ganglion cell complex (GCC) and peripapillary retinal nerve fiber layer thicknesses were measured in addition to macula and parafovea superficial and deep vasculature. RESULTS Age- and gender-mixed models showed that the macular and parafoveal superficial and deep vasculature density values were significantly lower in NAION eyes than control eyes (P ≤ 0.0001 for all comparisons). All vessel density values were not statistically different between papilledema eyes and control eyes. Whole superficial and deep macula vasculature in the NAION eyes (45.9% ± 4.2%, 50.9% ± 6.5%) were significantly lower than in papilledema eyes (50.5% ± 4.6%, 57.3% ± 6.1%) (P = 0.03 and P = 0.01, respectively). No significant differences in GCC thickness were observed among NAION, papilledema, and control eyes. Whole superficial and deep macular vasculatures, but not macular GCC thickness, were significantly correlated with visual field mean deviation (r = 0.39, P = 0.001 and r = 0.41, P < 0.001, respectively). CONCLUSIONS Macular OCT-A is able to show early macular vasculature abnormalities associated with optic nerve damage; this change occurs before detectable macular GCC atrophy. TRANSLATIONAL RELEVANCE Macular vessel density measurement offers an opportunity to evaluate the optic nerve damage at initial presentation, but further longitudinal studies are needed.
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Affiliation(s)
- Masoud Aghsaei Fard
- Farabi Eye Hospital, Eye Research Center, Tehran University of Medical Science, Tehran, Iran
| | - Hosein Ghahvechian
- Farabi Eye Hospital, Eye Research Center, Tehran University of Medical Science, Tehran, Iran
| | - Alireza Sahrayan
- Farabi Eye Hospital, Eye Research Center, Tehran University of Medical Science, Tehran, Iran
| | - Prem S. Subramanian
- Department of Ophthalmology, University of Colorado, School of Medicine, Aurora, CO, USA
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15
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Fard MA, Jalili J, Sahraiyan A, Khojasteh H, Hejazi M, Ritch R, Subramanian PS. Optical Coherence Tomography Angiography in Optic Disc Swelling. Am J Ophthalmol 2018; 191:116-123. [PMID: 29733809 DOI: 10.1016/j.ajo.2018.04.017] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 11/28/2022]
Abstract
PURPOSE To compare optical coherence tomography angiography (OCT-A) of peripapillary total vasculature and capillaries in patients with optic disc swelling. DESIGN Cross-sectional study. METHODS Twenty nine eyes with acute nonarteritic anterior ischemic optic neuropathy (NAION), 44 eyes with papilledema, 8 eyes with acute optic neuritis, and 48 eyes of normal subjects were imaged using OCT-A. Peripapillary total vasculature information was recorded using a commercial vessel density map. Customized image analysis with major vessel removal was also used to measure whole-image capillary density and peripapillary capillary density (PCD). RESULTS Mixed models showed that the peripapillary total vasculature density values were significantly lower in NAION eyes, followed by papilledema eyes and control eyes, using commercial software (P < .0001 for all comparisons). The customized software also showed significantly lower PCD of NAION eyes compared with papilledema eyes (all P < .001), but did not show significant differences between papilledema and control subjects. Our software showed significantly lower whole image and PCD in eyes with optic neuritis than papilledema. There was no significant difference between NAION and optic neuritis using our software. The area under the receiver operating curves for discriminating NAION from papilledema eyes and optic neuritis from papilledema eyes was highest for whole-image capillary density (0.94 and 0.80, respectively) with our software, followed by peripapillary total vasculature (0.9 and 0.74, respectively) with commercial software. CONCLUSIONS OCT-A is helpful to distinguish NAION and papillitis from papilledema. Whole-image capillary density had the greatest diagnostic accuracy for differentiating disc swelling.
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Affiliation(s)
- Masoud Aghsaei Fard
- Farabi Eye Hospital BB, Eye Research Center, Tehran University of Medical Science, Tehran, Iran.
| | - Jalil Jalili
- Medical Physics and Biomedical Engineering Department, Recearch Center for Molecular and Cellular Imaging, Bio-Optical Imaging Group, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Alireza Sahraiyan
- Farabi Eye Hospital BB, Eye Research Center, Tehran University of Medical Science, Tehran, Iran
| | - Hassan Khojasteh
- Farabi Eye Hospital BB, Eye Research Center, Tehran University of Medical Science, Tehran, Iran
| | - Marjane Hejazi
- Medical Physics and Biomedical Engineering Department, Recearch Center for Molecular and Cellular Imaging, Bio-Optical Imaging Group, School of Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Robert Ritch
- Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, New York, USA
| | - Prem S Subramanian
- Department of Ophthalmology, University of Colorado, School of Medicine, Aurora, Colorado, USA
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16
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Thompson AC, El-Dairi MA. Reply. J AAPOS 2018; 22:248-249. [PMID: 29635035 DOI: 10.1016/j.jaapos.2018.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 03/31/2018] [Indexed: 10/17/2022]
Affiliation(s)
| | - Mays A El-Dairi
- Department of Ophthalmology, Duke University, Durham, North Carolina
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17
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Fard MA. Bruch's membrane opening on optical coherence tomography in pediatric papilledema and pseudopapilledema. J AAPOS 2018. [PMID: 29535053 DOI: 10.1016/j.jaapos.2018.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Masoud Aghsaei Fard
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
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