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Retinal Nerve Fiber Layer and Ganglion Cell Complex Thicknesses Measured with Spectral-domain Optical Coherence Tomography in Eyes with No Light Perception Due to Nonglaucomatous Optic Neuropathy

Overview
Specialty Ophthalmology
Date 2015 May 13
PMID 25963074
Citations 10
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Abstract

Purpose: To measure retinal nerve fiber layer thickness (RNFLT) and ganglion cell complex thickness (GCCT) in eyes with no light perception due to nonglaucomatous optic neuropathy using spectral-domain optical coherence tomography.

Methods: Fourteen eyes of 14 patients (9 women, 5 men; mean age 56.0 ± 16.6 (standard deviation) years] with no light perception due to optic neuropathy were recruited to this retrospective study. Only clinically stable eyes were included. Eyes were imaged at least 6 months after the onset of the disease. Five patients lost light perception due to traumatic optic neuropathy, four patients had ischemic optic neuropathy, two patients had optic neuritis, two patients had compressive optic neuropathy, and one patient had optic nerve atrophy. Global and quadrant RNFLTs were measured with the Cirrus HD-optical coherence tomography (OCT) system; global and hemisphere GCCTs were measured by spectral-domain OCT (RTVue OCT system). Only reliable OCT images were used for further analysis.

Results: Reliable RNFL images were obtained in 12 eyes, and reliable GCC images were obtained in 11 eyes. Global, superior, temporal, inferior, and nasal RNFLT were 57.5 ± 6.7, 60.6 ± 7.6, 54.1 ± 11.2, 59.7 ± 9.5, and 55.6 ± 7.4 µm, respectively. Global, superior, and inferior GCC thicknesses were 68.8 ± 9.6, 70.7 ± 12.2, and 67.8 ± 8.8 µm, respectively.

Conclusions: A considerable proportion of RNFL and GCC remained in eyes with no light perception vision. Clinicians should take this into account when evaluating the severity of optic neuropathy from OCT-measured RNFLT and GCCT.

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