DR. AVIK DEY SARKAR

Dr. AJOY DEY SARKAR, Dr. SANJAY KUMAR DAULAT THAKUR, DR. SANCHARI SARKAR

Abstract

Aim: To investigate the correlation between orbital and intraocular portions of optic nerve among Primary Open Angle Glaucoma (POAG) patients.

Methods: One eye of 32 volunteers of newly diagnosed POAG patients underwent optic disc analysis using Optical Coherence Tomography and Echographic measurements of the retrobulbar optic nerve.

Results: Orbital optic nerve diameter and cross-sectional area correlated significantly and positively with neuroretinal rim area (OND: p value=0.00001; ONCSA: p value=0.00001) and average nerve fibre layer thickness (OND: p value=0.0001; ONCSA: p value=0.00002). Retrobulbar optic nerve cross-sectional area-to-disc area ratio (ONCSA/D) was found to have a statistically demonstrable positive correlation with neuroretinal rim area/disc area ratio (p=0.00003).

Conclusion: Orbital optic nerve dimensions reflect the neuroretinal rim area of the optic disc. Echographic measurements of the retrobulbar optic nerve add a new biomarker in the diagnosis of glaucoma.

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