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Abstract #77168 Published in IGR 19-3

Optic nerve head cupping in glaucomatous and non-glaucomatous optic neuropathy

Fard MA; Moghimi S; Sahraian A; Ritch R
British Journal of Ophthalmology 2019; 103: 374-378

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BACKGROUND: Enlargement of optic disc cupping is seen both in glaucoma and in neurological disorders. We used enhanced depth imaging with spectral-domain optical coherence tomography to differentiate glaucoma from non-glaucomatous optic neuropathy. METHODS: The optic discs were scanned in this prospective comparative study, and the lamina cribrosa (LC) thickness and anterior laminar depth (ALD) in the central, superior and inferior optic nerve head, and peripapillary choroidal thicknesses, were measured. RESULTS: There were 31 eyes of 31 patients with severe glaucoma and 33 eyes of 19 patients with non-glaucomatous cupping. Eyes of 29 healthy controls were also enrolled. There was no significant difference in the cup-to-disc ratio and in the average peripapillary nerve fibre layer thickness between the glaucoma and non-glaucomatous cupping groups (p>0.99). The average peripapillary choroidal thickness was thinner in glaucoma eyes than in the control eyes after adjusting for age and axial length. Glaucomatous and non-glaucomatous eyes had greater ALD and thinner LC than the control eyes (p<0.001 for both). ALDs of glaucoma eyes were deeper than non-glaucomatous eyes (p=0.01 for central ALD) when age, axial length and peripapillary choroidal thickness were included in the linear mixed model. Prelaminar thickness and LC thickness of glaucoma eyes were not different from non-glaucomatous eyes after adjusting. CONCLUSION: Deeper ALD was observed in glaucoma than non-glaucomatous cupping after adjusting for choroidal thickness.

Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran masood219@gmail.com.

Full article

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Classification:

6.9.2.2 Posterior (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis > 6.9.2 Optical coherence tomography)
9.2.3 Open angle glaucoma with elevated IOP (Part of: 9 Clinical forms of glaucomas > 9.2 Primary open angle glaucomas)
10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy
2.13 Retina and retinal nerve fibre layer (Part of: 2 Anatomical structures in glaucoma)

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