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Coskun C, Çelik G, Zeki Fikret C, Çomçalı S, Evren Kemer Ö. Evaluation of corneal densitometry values with Pentacam in cases of ocular hypertension and pseudoexfoliative glaucoma. Photodiagnosis Photodyn Ther 2024; 46:103988. [PMID: 38368915 DOI: 10.1016/j.pdpdt.2024.103988] [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: 08/26/2023] [Revised: 01/19/2024] [Accepted: 01/22/2024] [Indexed: 02/20/2024]
Abstract
BACKGROUND Examination of corneal densitometry measurements using the Pentacam Scheimpflug imaging system in cases of pseudoexfoliative glaucoma (PEXG) and ocular hypertension (OHT). METHODS The study included 50 eyes of 29 PEXG patients, 25 eyes of 16 OHT patients, and 76 eyes of 38 healthy control subjects followed in the glaucoma clinic. Corneal densitometry values of all cases were measured using the Scheimpflug imaging system (Pentacam, Oculus, Germany). Corneal densitometry was assessed based on 4 concentric radial zones (0-2 mm, 2-6 mm, 6-10 mm, and 10-12 mm) and depths (anterior, central, posterior, and total) within the Scheimpflug imaging system. The results were statistically analyzed. RESULTS Corneal densitometry values examined between the OHT and control groups were higher in OHT and statistically significant (p < 0.05). Corneal densitometry values examined between the PEXG and control groups were higher in PEXG and statistically significant (p < 0.05). In comparison between the PEXG and OHT groups, corneal densitometry values in the central 0-2 mm, 2-6 mm, and 6-10 mm; posterior 0-2 mm and 2-6 mm radial zones were higher in PEXG and statistically significant (p < 0.05). CONCLUSIONS It was observed that elevated intraocular pressure levels in OHT cases could lead to changes in the cornea, consequently increasing corneal densitometry values. The higher corneal densitometry values in PEXG cases compared to OHT were attributed to the accumulation of pseudoexfoliative material in the cornea. Based on our study, corneal densitometry could serve as a potential biomarker for early glaucoma detection in OHT cases and could be employed to assess corneal transparency during the follow-up of PEXG cases.
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Affiliation(s)
- Cigdem Coskun
- Department of Ophthalmology, Ankara Bilkent City Hospital, Ankara, Turkey.
| | | | - Cenk Zeki Fikret
- Department of Ophthalmology, Ankara Bilkent City Hospital, Ankara, Turkey
| | - Sebile Çomçalı
- Department of Ophthalmology, Ankara Bilkent City Hospital, Ankara, Turkey
| | - Özlem Evren Kemer
- Department of Ophthalmology, University of Health Sciences, Ankara Bilkent City Hospital, Ankara, Turkey
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Yilmaz YC, Hayat SC, Ipek SC. Analysis of Corneal and Lens Densitometry Changes in Patients With Type 1 Diabetes Mellitus. Am J Ophthalmol 2023; 254:23-30. [PMID: 37269970 DOI: 10.1016/j.ajo.2023.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 05/14/2023] [Accepted: 05/24/2023] [Indexed: 06/05/2023]
Abstract
PURPOSE By comparing the densitometry findings of patients with type 1 diabetes mellitus (T1DM) and the healthy group, we aimed to understand the possible changes that may occur in the cornea and lens in those with diabetes mellitus (DM). DESIGN Prospective, cross-sectional study. METHODS A total of 60 eyes of 60 patients with T1DM and 101 eyes of 101 healthy subjects were included in this study. A complete ophthalmologic evaluation was performed in all participants. Scheimpflug tomography was performed to record the corneal and lens densitometry and other tomographic data. Mean glycosylated hemoglobin (HbA1c) and mean DM duration were recorded. RESULTS The mean age of the patients with T1DM and patients in the control group was 29.93 ± 8.56 years and 27.27 ± 1 4.96 years, respectively. The mean HbA1c was 8.43 ± 1.92, and the mean DM duration was 14.10 ± 7.77 years. Corneal densitometry (CD) values were significantly higher in the 0- to 2-mm zone in all layers and in the anterior and central 6- to 10-mm zone in the diabetic group (P = .03, P = .018, P = .001, P = .000, P = .004). The mean crystalline lens densitometry was higher in the T1DM group (P = .129). There were positive correlations between DM duration and CD in the anterior 0- to 2-mm (P = .043), central 6- to 10-mm (P = .016), posterior 6- to 10-mm (P = .022), and posterior 10- to 12-mm zone (P = .043). CONCLUSIONS CD values were significantly higher in the diabetic group. Diabetes duration and HbA1c values showed correlations with densitometry especially in the 6- to 10-mm corneal zone. Evaluation of the cornea with optical densitometry will be useful in the early diagnosis and follow-up of clinical structural and functional changes in the cornea.
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Affiliation(s)
- Yusuf Cem Yilmaz
- From the The Agri İbrahim Cecen University Faculty of Medicine, Department of Ophthalmology, Agri, Turkey (Y.C.Y., S.C.I.).
| | - Serife Ciloglu Hayat
- Başakşehir Çam Sakura State Hospital, Department of Ophthalmology, Istanbul, Turkey (S.C.H.)
| | - Sefik Can Ipek
- From the The Agri İbrahim Cecen University Faculty of Medicine, Department of Ophthalmology, Agri, Turkey (Y.C.Y., S.C.I.)
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Molero-Senosiain M, Morales-Fernandez L, Saenz-Frances F, Kwan J, Garcia Feijoo J, Martínez-de-la-Casa JM. Analysis of the influence of corneal properties and densitometry on applanation and rebound tonometry in primary open angle glaucoma. J Fr Ophtalmol 2023; 46:249-257. [PMID: 36739259 DOI: 10.1016/j.jfo.2022.08.013] [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: 05/10/2022] [Revised: 07/30/2022] [Accepted: 08/16/2022] [Indexed: 02/05/2023]
Abstract
PURPOSE To evaluate the influence of corneal densitometry on portable applanation (Perkins) and rebound (iCare ic100 and PRO) tonometry. A secondary goal was to assess if there was a relationship between various corneal properties and the severity of primary open angle glaucoma (POAG). MATERIAL AND METHODS Seventy-five eyes of 75 patients with primary open angle glaucoma were studied, divided by severity into 3 groups: 25 mild, 25 moderate and 25 advanced. Intraocular pressure (IOP) was measured 3 times in each participant with a Perkins applanation tonometer (PAT), a handheld version of the Goldman applanation tonometer (GAT), an iCare PRO and an iCare ic100. Mean values were then calculated. Corneal topography with the Pentacam HR (Oculus, Wetzlar, Germany) was also performed in all individuals. RESULTS Mean age and sex were comparable in all groups, as were densitometry values (P>0.05). The mean visual field defect (MD) was 2.85 (±1.23) dB in the mild glaucoma group, 8.26 (±1.90) dB in the moderate group and 15.66 (±3.46) dB in the advanced group. Three multivariate regression analyses were performed. The first and second calculations assessed the effect of IOP obtained with iCare ic100 and PAT as dependent variables with age, sex, CCT and mean keratometry (Km) within the glaucoma subgroups and the global sample. The third analysis was carried out to assess the relationship between corneal densitometry as the dependant variable and the aforementioned corneal parameters among the glaucoma groups. In the first multivariate regression analysis, a statistically significant correlation was found between ic100 rebound tonometry and CCT in the POAG global sample (coef. 0.117; IC [-0.21-(-0.01)]; P=0.025). No statistically significant correlation was found in the subgroup analyses. In the second multivariate analysis, no significant correlation was found between PAT and CCT, Km, age or sex (P>0.05). In the third analysis, densitometry was correlated with age in all glaucoma subgroups (P<0.001) and with CCT in the moderate glaucoma subgroup (coef. -0.037; IC [-0.67-(-0.01)]; P=0.021). Tonometry appeared to be minimally influenced by corneal densitometry, with a mild positive linear correlation seen (R=0.03). IOP values were similar with 3 of the tonometers: PAT 16.07 (±3.18) mmHg, PRO 16.27 (±3.42) mmHg and ic100 15.17 (±4.28) mmHg. There was, however, a significant underestimation of IOP with ic100 (-0.89mmHg) compared to PAT (P=0.007). CONCLUSION Corneal densitometry did not show significant differences between glaucoma severity groups. A positive correlation was seen with CCT and both corneal densitometry and age. No correlation was found with keratometry or severity of glaucoma. The influence of corneal densitometry on IOP measurements appears weak, with little clinical relevance identified.
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Affiliation(s)
| | | | | | - J Kwan
- Univeristy Hospitals of Leicester, England, Leicester, United Kingdom
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Nalcacioglu P, Sen E, Aydemir E, Kiziltoprak H, Yasar HH. Objective assessment of corneal backscattered light in myopic, hyperopic, and emmetropic children. Photodiagnosis Photodyn Ther 2022; 40:103031. [PMID: 35882289 DOI: 10.1016/j.pdpdt.2022.103031] [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: 03/24/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND To determine the corneal densitometry(CD) values by using Scheimpflug imaging in myopic and hyperopic children and to compare the results with emmetropic children. METHODS The CD measurements of the subject were obtained with Scheimpflug tomography. The values were automatically measured in standardized grayscale units over an area 12mm in diameter, which was subdivided into 4 annular concentric zones(0-2mm, 2-6mm, 6-10mm, 10-12mm) and 3 corneal depths(anterior layer: anterior 120µm; central layer: from 120µm to the last 60µm; posterior layer: last 60µm). In addition, we evaluated the correlation between spherical equivalence and anterior corneal morphological parameters and the CD values. RESULTS A total of 211 participants were included in this prospective cross-sectional study. The eyes were divided into three groups related to their spherical equivalent(SE) refractive error values as follows: 88(41.7%) hyperopic eyes, 62(29.4%) myopic eyes, and 61(28.9%) emmetropic control eyes. The hyperopic eyes were found to have lower corneal densitometry values in 4 annular zones and the total 0-12 diameter of all layers except the central layer. However, only the 6-10mm annular zone of the central and posterior layers of the myopic eyes had lower corneal densitometry values than emmetropic eyes. There was also a significant correlation between spherical equivalent and corneal densitometry values in the anterior layer(0-2mm, 2-6mm zones), central layer(0-2mm, 10-12mm zones), posterior layer(6-10mm, 10-12mm zones, and the total 0-12mm diameter), and total corneal thickness(0-2mm zone) of the hyperopic eyes. CONCLUSIONS Backward scattering of light was lower in hyperopic eyes and this could indicate better visual quality.
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Affiliation(s)
- Pinar Nalcacioglu
- Department of Ophthalmology, Yildirim Beyazit University Medical School, Universiteler Avenue 1604 street no:9, Cankaya, Ankara, Turkey.
| | - Emine Sen
- University of Health Sciences, Ulucanlar Eye Education and Research Hospital, Ankara, Turkey
| | - Emre Aydemir
- Adiyaman Education and Research Hospital, Department of Ophthalmology, Adiyaman, Turkey
| | - Hasan Kiziltoprak
- Adiyaman University Medical School, Department of Ophthalmology, Adiyaman, Turkey
| | - Hakan Halit Yasar
- University of Health Sciences, Ulucanlar Eye Education and Research Hospital, Ankara, Turkey
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Karmiris E, Soulantzou K, Machairoudia G, Ntravalias T, Tsiogka A, Chalkiadaki E. Corneal Densitometry Assessed With Scheimpflug Camera in Healthy Corneas and Correlation With Specular Microscopy Values and Age. Cornea 2022; 41:60-68. [PMID: 33797466 DOI: 10.1097/ico.0000000000002722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 02/05/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE To investigate correlations between specular microscopy endothelial parameters and age with corneal densitometry values, as they are presented from a Scheimpflug device, in different levels of the cornea. METHODS Two hundred eighty-four eyes of 142 healthy subjects were included in this observational, prospective study. Corneal densitometry was evaluated with Scheimpflug imaging system in the central 0- to 2-mm annular zone of the cornea, whereas the endothelial cell properties were assessed with the use of a noncontact specular microscope. RESULTS Corneal densitometry values of all corneal layers were statistically significant and positively correlated with age. In univariate linear regression analysis among corneal densitometry values and the endothelial parameters, only endothelial cell density (CD) was statistically significant and inversely correlated with densitometry values in all corneal layers. In stepwise multivariate linear regression analysis, after adjustment for age, hexagonality was statistically significant and inversely correlated with posterior densitometry values, whereas coefficient of variation was positively and significantly correlated with the anterior densitometry values. When repeating stepwise multivariate linear regression analysis without adjusting for age, CD was negatively and significantly correlated with corneal densitometry values of all layers, whereas coefficient of variation was positively and significantly correlated with anterior and total corneal densitometry values. CONCLUSIONS Corneal densitometry increases with age. It is also inversely correlated with CD, and this might be used as an indirect way to assess the status of the corneal endothelium.
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Affiliation(s)
- Efthymios Karmiris
- Ophthalmology Department, Hellenic Air Force General Hospital, Athens, Greece
| | | | - Genovefa Machairoudia
- Ophthalmology Department, Hellenic Air Force General Hospital and Attikon University Hospital, Athens, Greece ; and
| | - Thomas Ntravalias
- Ophthalmology Department, Hellenic Air Force General Hospital, Athens, Greece
| | - Anastasia Tsiogka
- Ophthalmology Department, Hellenic Army General Hospital, Athens, Greece
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Durukan I. Evaluation of corneal and lens clarity in unilateral pseudoexfoliation syndrome: a densitometric analysis. Clin Exp Optom 2021; 101:740-746. [DOI: 10.1111/cxo.12802] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 05/02/2018] [Accepted: 05/18/2018] [Indexed: 12/29/2022] Open
Affiliation(s)
- Irfan Durukan
- Ophthalmology Department, Era Goz Hospital, Ankara, Turkey,
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Simsek M, Cakar Ozdal P, Cankurtaran M, Ozdemir HB, Elgin U. Analysis of Corneal Densitometry and Endothelial Cell Function in Fuchs Uveitis Syndrome. Eye Contact Lens 2021; 47:196-202. [PMID: 32483051 DOI: 10.1097/icl.0000000000000717] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2020] [Indexed: 12/14/2022]
Abstract
OBJECTIVES To evaluate corneal densitometry and endothelial cell properties in patients with unilateral Fuchs uveitis syndrome (FUS), and to compare results with unaffected contralateral eyes and healthy control subjects. METHODS A total of 90 participants were included in this prospective cross-sectional study. Forty-five affected eyes of patients with FUS were regarded as group 1 (FUSa), 45 fellow eyes were regarded as group 2 (FUSf), and 45 healthy-control eyes were regarded as group 3. Corneal densitometry was measured with densitometry software of Scheimpflug Corneal Topography (Pentacam HR, Oculus GmbH, Wetzlar, Germany), whereas endothelial cell measurement was evaluated with specular microscopy (Tomey, EM4000, GmbH, Germany). RESULTS The mean corneal densitometry values were higher in the midstromal (zones; 2-6, 6-10 mm), posterior (all zones), and total thickness (zones; 2-6, 6-10 mm) layers in the FUSa compared with FUSf and control eyes (P<0.05 for all comparisons). The mean values of average cell area and cell size characteristics (minimum, maximum, SD, and coefficient of variation) were higher; endothelial cell density and percentage of hexagonal cells were lower in the FUSa than in the other two groups (P<0.05 for all comparisons). There was a significantly strong correlation between specular microscopy parameters and posterior corneal densitometry values in the FUSa group. CONCLUSIONS Impairment of endothelial cell function in affected eyes of patients with FUS resulted in increased values of corneal densitometry, especially posterior layer.
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Affiliation(s)
- Mert Simsek
- Department of Ophthalmology (M.S., P.C.O., M.C., U.E.), University of Health Sciences, Ulucanlar Eye Education and Research Hospital, Ankara, Turkey ; and Department of Ophthalmology (H.B.O.), Gazi University School of Medicine, Ankara, Turkey
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8
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Corneal Properties in Primary Open-angle Glaucoma Assessed Through Scheimpflug Corneal Topography and Densitometry. J Glaucoma 2020; 30:444-450. [PMID: 33394845 DOI: 10.1097/ijg.0000000000001770] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 12/10/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE The purpose of this study was to compare corneal topography and densitometry measurements in patients with primary open-angle glaucoma (POAG) and healthy subjects. PATIENTS AND METHODS A total of 200 eyes of 75 patients with POAG and 125 healthy controls underwent corneal topography and densitometry (Oculus Pentacam HR). The data compared in the 2 groups were: anterior chamber angle, anterior chamber depth, and anterior chamber volume, keratometry (Kminimum, Kmaximum, and Kmean), central corneal thickness, central anterior elevation, anterior elevation apex, maximum anterior elevation, and posterior elevation apex. Densitometry measurements were made at 3 depths on a 12-mm-diameter circle divided into 4 concentric rings (0 to 2, 2 to 6, 6 to 10, and 10 to 12 mm). The diagnostic capacity of the corneal variables was assessed through the areas under the receiver operating characteristics curve. RESULTS The corneal density of practically all depth layers and total corneal density were significantly higher in the POAG than the control group (P<0.05). Total corneal density was positively correlated with age (r=0.623; P<0.001) and also showed a good diagnostic capacity for glaucoma [area under the curve=0.617; 95% confidence interval (CI): 0.541-0.697; P<0.001]. In a multiple linear regression designed to assess its relationship with age, sex, central corneal thickness, and Kmean, age emerged as a significant confounder both in controls (coefficient=0.315; P<0.001; 95% CI: 0.246-0.384) and patients (coefficient=0.370; P<0.001; 95% CI: 0.255-0.486). CONCLUSION Corneal densitometry measurements showed a good diagnostic capacity for POAG suggesting this type of examination could have clinical applications in the diagnosis and management of glaucoma.
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Olyntho Junior MADC, Augusto LB, Gracitelli CPB, Tatham AJ. The Effect of Corneal Thickness, Densitometry and Curvature on Intraocular Pressure Measurements Obtained by Applanation, Rebound and Dynamic Contour Tonometry. Vision (Basel) 2020; 4:vision4040045. [PMID: 33096873 PMCID: PMC7711663 DOI: 10.3390/vision4040045] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/10/2020] [Accepted: 10/19/2020] [Indexed: 02/01/2023] Open
Abstract
Evaluate the effect of corneal thickness, densitometry and curvature on intraocular pressure (IOP) measurements obtained by Goldmann applanation tonometry (GAT), non-contact tonometry (NCT), rebound tonometry (RT), and dynamic contour tonometry (DCT). A cross-sectional prospective study involving 40 participants was performed. Corneal measurements were obtained using Pentacam (Oculus GMbH, Wetzlar, Germany), densitometry was measured at annuli of 0–2, 2–6, 6–10 and 10–12 mm. The relationship between corneal thickness (central, 4 and 6 mm), corneal astigmatism and corneal densitometry and IOP was examined. There was a significant relationship between corneal thickness (central, 4 and 6 mm) and GAT180, GAT90, RT, and NCT (P < 0.001 for all comparisons) but not for DCT. Higher corneal densitometry (6–10 mm and 10–12 mm zones) was associated with higher IOP from GAT180 and GAT90, and higher densitometry in the 6–10 mm zone correlated with higher IOP from NCT, however corneal densitometry increased with age. Accounting for age, the relationship between corneal densitometry and IOP measurements was not significant. In eyes with greater corneal astigmatism there was a greater difference between GAT90 and GAT180 measurements. IOP measurements may be affected by corneal thickness, densitometry and curvature. DCT was less affected by properties of the cornea compared to other devices.
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Affiliation(s)
| | | | - Carolina P B Gracitelli
- Department of Ophthalmology and Visual Sciences, Federal University of São Paulo, 13565-905 São Paulo, Brazil
- Centro de Estudos Alcides Hirai, Ver Mais Oftalmologia, 07750-000 Vinhedo, São Paulo, Brazil
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Cankurtaran V, Tekin K, Cakmak AI, Inanc M, Turgut FH. Assessment of corneal topographic, tomographic, densitometric, and biomechanical properties of Fabry patients with ocular manifestations. Graefes Arch Clin Exp Ophthalmol 2020; 258:1057-1064. [PMID: 31915973 DOI: 10.1007/s00417-019-04593-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 12/22/2019] [Accepted: 12/27/2019] [Indexed: 12/11/2022] Open
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Urbaniak D, Seredyka-Burduk M, Błoch W, Malukiewicz G, Kałużny BJ. Scheimpflug Camera Measurement of Optical Density of the Corneal Epithelium, Stroma, and Endothelium in Patients with Pseudoexfoliation Syndrome. Med Sci Monit 2018; 24:5826-5831. [PMID: 30129566 PMCID: PMC6113855 DOI: 10.12659/msm.908738] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The present study evaluated the optical density of particular layers of the cornea and anterior lens capsule in patients with pseudoexfoliation syndrome (PEX). MATERIAL AND METHODS Sixty patients with cataract and PEX (mean age 76.6±5.6 years, range 62-88 years) were compared to 55 controls with cataract without PEX syndrome (mean age 76.3±6.09 years, range 62-90 years; P>0.05). The anterior segment of one eye was examined in each patient using Pentacam HR by Oculus before the planned cataract surgery. RESULTS The average optical density of the corneal epithelium, stroma, and endothelium was 25.3±6.09% and 19.9±3.41% (P<0.001), 23.1±5.5% and 19.2±3.6% (P<0.0001), and 14.6±3.4% and 12.3±2.1% (P<0.0001) in the PEX and control groups, respectively. The optical density of the anterior lens capsule was 13.6±4.2% in the PEX group and 9.74± 2.23% in the control group (P<0.0001). The average thickness of the cornea was 555 μm and 556 μm and the average optical density of endothelial cells 2240/mm² and 2323/mm² in the PEX and control groups, respectively (P<0.05). CONCLUSIONS In patients with PEX, increased optical density was observed not only in the structures with pseudoexfoliative material detectable by a slit-lamp), but also in the corneal epithelium and stroma. The increased optical density was not associated with reduced endothelial cell density or increased central cornea thickness.
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Affiliation(s)
- Dorota Urbaniak
- Department of Opthalmology, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Małgorzata Seredyka-Burduk
- Department of Ophthalmology, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.,Department of Optometry, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Waldemar Błoch
- Department of Optometry, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Grażyna Malukiewicz
- Department of Ophthalmology, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.,Department of Optometry, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
| | - Bartłomiej J Kałużny
- Department of Optometry, Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland.,Oftalmika Eye Hospital, Bydgoszcz, Poland
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Tekin K, Kiziltoprak H, Koc M, Goker YS, Kocer AM, Yilmazbas P. The effect of corneal infiltrates on densitometry and higher-order aberrations. Clin Exp Optom 2018; 102:140-146. [PMID: 30107640 DOI: 10.1111/cxo.12828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/05/2018] [Accepted: 07/12/2018] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND This study aimed to measure the effects of persistent corneal subepithelial infiltrates associated with epidemic keratoconjunctivitis on corneal densitometry and total corneal higher order aberrations (HOAs), and to compare these measurements with the data obtained from their fellow unaffected healthy eyes. METHODS This prospective cross-sectional study included those who had persistent subepithelial infiltrates in only the affected eyes for at least three months and clinically normal fellow unaffected eyes. Corneal densitometry was measured with the densitometry software of the Pentacam HR-Scheimpflug corneal topographer over a 12 mm diameter of cornea. Further, total corneal HOAs including coma (Z[1,3], Z[3,-1]), trefoil (Z[3], Z[3,-3]), spherical aberration, higher order root mean square (HO-RMS), and total RMS in the Zernike analysis were analysed by the same Pentacam HR device. RESULTS Forty-six eyes of 23 participants were analysed in this study. The mean corneal densitometry values were statistically significantly higher in all annular concentric areas (0-2, 2-6, 6-10, and 10-12 mm) of the anterior and central corneal layers in the eyes with subepithelial infiltrates when compared to normal fellow eyes (p < 0.05, for each one). Additionally, there were statistically significant differences between the eyes with subepithelial infiltrates and normal fellow eyes with regard to coma, trefoil, HO-RMS, and total RMS in the Zernike analysis (p < 0.05, for each one). CONCLUSION This study quantitatively demonstrated that persistent corneal subepithelial infiltrates associated with epidemic keratoconjunctivitis decrease corneal transparency and corneal optical quality in affected eyes.
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Affiliation(s)
- Kemal Tekin
- Ophthalmology Department, Ercis State Hospital, Van, Turkey
| | - Hasan Kiziltoprak
- Ophthalmology Department, Ulucanlar Eye Training and Research Hospital, Ankara, Turkey
| | - Mustafa Koc
- Ophthalmology Department, Ulucanlar Eye Training and Research Hospital, Ankara, Turkey
| | - Yasin Sakir Goker
- Ophthalmology Department, Ulucanlar Eye Training and Research Hospital, Ankara, Turkey
| | - Ali Mert Kocer
- Ophthalmology Department, Ulucanlar Eye Training and Research Hospital, Ankara, Turkey
| | - Pelin Yilmazbas
- Ophthalmology Department, Ulucanlar Eye Training and Research Hospital, Ankara, Turkey
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Dong J, Zhang Y, Zhang H, Jia Z, Zhang S, Sun B, Han Y, Wang X. Corneal densitometry in high myopia. BMC Ophthalmol 2018; 18:182. [PMID: 30045701 PMCID: PMC6060530 DOI: 10.1186/s12886-018-0851-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 07/16/2018] [Indexed: 11/17/2022] Open
Abstract
Background To investigate corneal densitometry values obtained using Scheimpflug tomography in normal and highly myopic (HM) eyes and to assess the differences in densitometry values between them. Methods Highly myopic and normal corneas were examined using the Pentacam Scheimpflug imaging system. Corneal densitometry was automatically performed over a 12-mm diameter area, which was divided on the basis of annular concentric zones (0–2 mm, 2–6 mm, 6–10 mm, 10–12 mm, total diameter) and depth (anterior layer: inner 120 μm; center layer: from 120 μm to the last 60 μm; posterior layer: last 60 μm; total corneal thickness). Results A total of 100 normal and 100 HM eyes were enrolled in this study. Upon total corneal thickness densitometry, the HM group was found to have significantly lower values compared with the normal group in 4 annuli, including the 2 mm central zone, 2-6 mm zone, 6–10 mm zone, and 0–12 mm total diameter. Upon anterior layer densitometry, the HM group demonstrated statistically lower values in the 2-6 mm and 6–10 mm zones. Upon densitometry of the central and posterior layers, the HM group was found to have lower values in all annuli. Conclusions The densitometry map reveals that light backscatter was lower in most portions of the HM cornea than in the normal cornea.
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Affiliation(s)
- Jing Dong
- Department of Ophthalmology, The First Hospital of Shanxi Medical University, Taiyuan, 030001, Shanxi, People's Republic of China
| | - Yaqin Zhang
- Department of Ophthalmology, Shanxi Eye Hospital, No. 100 Fudong Street, Taiyuan, 030002, Shanxi, People's Republic of China
| | - Haining Zhang
- Department of Ophthalmology, Shanxi Eye Hospital, No. 100 Fudong Street, Taiyuan, 030002, Shanxi, People's Republic of China
| | - Zhijie Jia
- Department of Ophthalmology, Shanxi Eye Hospital, No. 100 Fudong Street, Taiyuan, 030002, Shanxi, People's Republic of China
| | - Suhua Zhang
- Department of Ophthalmology, Shanxi Eye Hospital, No. 100 Fudong Street, Taiyuan, 030002, Shanxi, People's Republic of China
| | - Bin Sun
- Department of Ophthalmology, Shanxi Eye Hospital, No. 100 Fudong Street, Taiyuan, 030002, Shanxi, People's Republic of China
| | - Yongqing Han
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao, 028007, Inner Mongolia, People's Republic of China
| | - Xiaogang Wang
- Department of Ophthalmology, Shanxi Eye Hospital, No. 100 Fudong Street, Taiyuan, 030002, Shanxi, People's Republic of China.
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Fernández-Vigo JI, de-Pablo Gómez de Liaño L, Sánchez-Guillen I, Macarro-Merino A, Fernández-Vigo C, García-Feijóo J, Fernández-Vigo JA. Pseudoexfoliation signs in the anterior segment assessed by optical coherence tomography and Scheimpflug device. ARCHIVOS DE LA SOCIEDAD ESPANOLA DE OFTALMOLOGIA 2018; 93:53-59. [PMID: 28743412 DOI: 10.1016/j.oftal.2017.06.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 06/02/2017] [Accepted: 06/21/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To evaluate different anterior segment parameters in eyes with pseudoexfoliation (PSX), fellow eyes, and controls using optical coherence tomography and a Scheimpflug imaging system. METHODS Three groups were studied: 44 eyes of 44 patients with PSX, 30 clinically unaffected fellow eyes, and 148 eyes of 148 healthy controls. The anterior chamber depth and volume, corneal volume and thickness, pupil diameter and corneal densitometry were measured using a Scheimpflug imaging system (Pentacam, Oculus Inc.; Wetzlar, Germany). The angle width, the length and area of the trabecular meshwork, and the iris thickness were measured using an optical coherence tomography RTVue 100 device (Optovue, Fremont, CA, USA). The presence of PSX deposits was also assessed by OCT. RESULTS There were no differences in the anterior chamber volume or depth in the corneal volume or central thickness (P≥.228). The corneal densitometry was similar between PSX and fellow eyes; however it was greater than in the control group (P<.001). As regards the parameters measured by OCT, there were no differences in the angle width or in the trabecular meshwork size between the 3 groups; however, the iris was thinner in controls (P=.005). In all patients the PSX deposits were correctly visualised by OCT after the identification by biomicroscopy. CONCLUSIONS There were no differences in the anterior segment biometric measurements between patients with PSX and controls, although the corneal densitometry and iris thickness were greater in the PSX and fellow eyes groups.
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Affiliation(s)
- J I Fernández-Vigo
- Departamento de Oftalmología, Hospital Universitario Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Madrid, España; Centro Internacional de Oftalmología Avanzada, Madrid, España.
| | - L de-Pablo Gómez de Liaño
- Centro Internacional de Oftalmología Avanzada, Madrid, España; Departamento de Oftalmología, Hospital Universitario 12 de Octubre, Madrid, España
| | | | | | | | - J García-Feijóo
- Departamento de Oftalmología, Hospital Universitario Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Madrid, España
| | - J A Fernández-Vigo
- Centro Internacional de Oftalmología Avanzada, Madrid, España; Departamento de Oftalmología, Universidad de Extremadura , Badajoz, España
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