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Abstract #15249 Published in IGR 8-4
Comparison of optic disk and retinal nerve fiber layer thickness in nonglaucomatous and glaucomatous patients with high myopia
Melo GB; Libera RD; Barbosa AS; Pereira LM; Doi LM; Melo LA JrAmerican Journal of Ophthalmology 2006; 142: 858-860
See also comment(s) by Joel Schuman & Gadi Wollstein •
PURPOSE: To assess the optic nerve head (ONH) by optical coherence tomography (OCT), confocal scanning laser ophthalmoscopy (CSLO), and the retinal nerve fiber layer (RNFL) by OCT and scanning laser polarimetry (GDx) in highly myopic subjects. DESIGN: Observational cross-sectional study. METHODS: Thirty-five eyes of highly myopic individuals without glaucoma and 17 eyes of highly myopic patients with glaucoma were included in this study. All patients had myopia higher than 5.0 diopters and ocular axial length higher than 25 mm. In those patients without glaucoma, the intraocular pressure (IOP) was less than 21 mmHg. RESULTS: Mean (SD) OCT cup-to-disk area ratio was 0.45 (0.30) and 0.58 (0.29) in the nonglaucomatous and glaucomatous subjects, respectively (P = .22); CSLO cup-to-disk area ratio was 0.27 (0.27) and 0.24 (0.23), respectively (P = .75); and OCT-RNFL was 65.2 (26.2) μm and 56.8 (28.6) μm (P = .43). CONCLUSIONS: OCT, CSLO, and GDx are not useful to discriminate nonglaucomatous and glaucomatous subjects that have high myopia.
Dr. G.B. Melo, Glaucoma Service, Department of Ophthalmology, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil. gustavobmelo@yahoo.com.br
Classification:
8.1 Myopia (Part of: 8 Refractive errors in relation to glaucoma)
6.9.2 Optical coherence tomography (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)
2.13 Retina and retinal nerve fibre layer (Part of: 2 Anatomical structures in glaucoma)
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)