1
|
Cheng D, Ruan K, Wu M, Qiao Y, Gao W, Lian H, Shen M, Bao F, Yang Y, Zhu J, Huang H, Meng X, Shen L, Ye Y. Characteristics of the Optic Nerve Head in Myopic Eyes Using Swept-Source Optical Coherence Tomography. Invest Ophthalmol Vis Sci 2022; 63:20. [PMID: 35731511 PMCID: PMC9233286 DOI: 10.1167/iovs.63.6.20] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Purpose To investigate the characteristics of the optic nerve head (ONH) in myopia using swept-source optical coherence tomography (SS-OCT). Methods Participants were divided into three groups according to the axial length (AL). The optic disc morphology, retinal nerve fiber layer (RNFL) thickness, and radial peripapillary capillary (RPC) vessel density (VD), optic disc tilt, rotation, Bruch's membrane opening distance (BMOD), border length (BL), border tissue angle, focal lamina cribrosa (LC) defects, β- and γ-zone peripapillary atrophy (PPA), microvasculature dropout (MvD), choroidal thickness (CT), and the choroidal vascularity index (CVI) were compared. Linear regression analysis evaluated relationships between spherical equivalent, AL, and ONH parameters. Results One hundred five, 98, and 118 eyes were included in groups 1, 2, and 3, respectively. With AL increasing, the mean, superior and temporal CT, central mean and temporal, pericentral mean, inferior and nasal RPC VD, and temporal CVI decreased, whereas the mean and temporal RNFL thickness, optic disc, RIM and β-PPA area, presence and area of γ-PPA, BMOD and BL increased. Compared to other groups, group 3 depicted a larger cup area, more focal LC defect and total and juxtapapillary MvD; a lower central superior, inferior and nasal, pericentral superior, and temporal RPC VD. Group 1 demonstrated more tilted disc, larger inferior and nasal CT, mean, superior, inferior, and nasal CVI. Conclusions Myopia eyes have larger ONH changes, PPAs, regional RNFL, and MvD, but smaller regional CTs, RPC VD, and CVIs. SS-OCT may be useful in detecting ONH variations during myopia.
Collapse
Affiliation(s)
- Dan Cheng
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Kaiming Ruan
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Minhui Wu
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Yilin Qiao
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Weiqian Gao
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Hengli Lian
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Meixiao Shen
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Fangjun Bao
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Yizeng Yang
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Jun Zhu
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Haiying Huang
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Xianwei Meng
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Lijun Shen
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China.,Department of Ophthalmology, Zhejiang Provincial People's Hospital, Hanghzou, Zhejiang, China
| | - Yufeng Ye
- The Affiliated Eye Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| |
Collapse
|
2
|
Factors Associated with Changes in Peripapillary Retinal Nerve Fibre Layer Thickness in Healthy Myopic Eyes. J Ophthalmol 2022; 2021:3462004. [PMID: 34987866 PMCID: PMC8723879 DOI: 10.1155/2021/3462004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 12/06/2021] [Indexed: 12/23/2022] Open
Abstract
Myopic people face an elevated risk of primary open angle glaucoma. Changes in the fundus in people with high myopia often lead to misdiagnosis of glaucoma, as this condition has many clinical signs in common with myopia, making the diagnosis of glaucoma more challenging. Compared to reduction of the visual field, a decrease in retinal nerve fibre layer (RNFL) thickness occurs earlier in glaucoma, which is widely considered useful for distinguishing between these conditions. With the development of optical coherence tomography (OCT), RNFL thickness can be measured with good reproducibility. According to previous studies, this variable is not only affected by axial length but also related to the patient's age, gender, ethnicity, optic disc area, and retinal blood flow in myopia. Herein, we intend to summarize the factors relevant to the RNFL in myopia to reduce the false-positive rate of glaucoma diagnosis and facilitate early prevention of myopia.
Collapse
|
3
|
Lin T, Su L, Lin J, Qiu H. Study on the Optic Nerve Fiber Layer Thickness and Changes in Blood Flow in Myopic Children. Int J Gen Med 2021; 14:3287-3293. [PMID: 34267547 PMCID: PMC8276819 DOI: 10.2147/ijgm.s317476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 06/16/2021] [Indexed: 01/02/2023] Open
Abstract
Objective The present study aims to observe the optic nerve fiber layer thickness and blood flow density in the papillary area and investigate the effects of axial length (AL) and the refractive state of the optic papilla blood flow density in children with different refractive conditions. Methods The present study was a clinical control study. The right eyes of 204 minors aged 6-17 years were studied. The eyes were divided into four groups according to myopic refractive states. OCTA analyzed the data to compare the radial peripapillary capillary (RPC) density and the difference in the retinal nerve fiber layer (RNFL) thickness adjacent to the optic papilla between the four refraction groups. Results The intra-optic disc blood flow density was significantly and negatively correlated with the AL and was negatively correlated with the AL in the inferior temporal quadrants. The RNFL in the superior, nasal, and inferior quadrants was negatively correlated with the AL. The RNFL in the temporal quadrant was positively correlated with the AL. Conclusion Our present study revealed that aAs myopia increased and the AL grew in children, the blood density of the entire image of the optic papilla, in the optic disc, and the retinal capillaries in the inferior parapapillary and temporal quadrant would change significantly. With increasing AL, a significant decrease in the intra-disc and para-disc RNFL was observed in the superior, nasal, and inferior quadrants, while a substantial increase in RNFL was observed in the temporal quadrant.
Collapse
Affiliation(s)
- TaiNan Lin
- Department of Ophthalmology, Fujian Provincial Governmental Hospital, Fuzhou, People's Republic of China
| | - Ling Su
- School Health Department, Fujian Center for Disease Control and Prevention, Fuzhou, People's Republic of China
| | - JinHua Lin
- Department of Ophthalmology, Fujian Provincial Governmental Hospital, Fuzhou, People's Republic of China
| | - Hong Qiu
- Department of Ophthalmology, Fujian Provincial Governmental Hospital, Fuzhou, People's Republic of China
| |
Collapse
|
4
|
Tan O, Liu L, You Q, Wang J, Chen A, Ing E, Morrison JC, Jia Y, Huang D. Focal Loss Analysis of Nerve Fiber Layer Reflectance for Glaucoma Diagnosis. Transl Vis Sci Technol 2021; 10:9. [PMID: 34111254 PMCID: PMC8107497 DOI: 10.1167/tvst.10.6.9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To evaluate nerve fiber layer (NFL) reflectance for glaucoma diagnosis. Methods Participants were imaged with 4.5 × 4.5 mm volumetric disc scans using spectral-domain optical coherence tomography. The normalized NFL reflectance map was processed by an azimuthal filter to reduce directional reflectance bias caused by variation of beam incidence angle. The peripapillary area of the map was divided into 160 superpixels. Average reflectance was the mean of superpixel reflectance. Low-reflectance superpixels were identified as those with NFL reflectance below the fifth percentile normative cutoff. Focal reflectance loss was measured by summing loss in low-reflectance superpixels. Results Thirty-five normal, 30 preperimetric, and 35 perimetric glaucoma participants were enrolled. Azimuthal filtering improved the repeatability of the normalized NFL reflectance, as measured by the pooled superpixel standard deviation (SD), from 0.73 to 0.57 dB (P < 0.001, paired t-test) and reduced the population SD from 2.14 to 1.78 dB (P < 0.001, t-test). Most glaucomatous reflectance maps showed characteristic patterns of contiguous wedge or diffuse defects. Focal NFL reflectance loss had significantly higher diagnostic sensitivity than the best NFL thickness parameter (from map or profile): 77% versus 55% (P < 0.001) in glaucoma eyes with the specificity fixed at 99%. Conclusions Azimuthal filtering reduces the variability of NFL reflectance measurements. Focal NFL reflectance loss has excellent glaucoma diagnostic accuracy compared to the standard NFL thickness parameters. The reflectance map may be useful for localizing NFL defects. Translational Relevance The high diagnostic accuracy of NFL reflectance may make population-based screening feasible.
Collapse
Affiliation(s)
- Ou Tan
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - Liang Liu
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - Qisheng You
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - Jie Wang
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - Aiyin Chen
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - Eliesa Ing
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - John C Morrison
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - Yali Jia
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| | - David Huang
- Casey Eye Institute, Oregon Health & Science University, Portland, OR, USA
| |
Collapse
|