AVIK DEY SARKAR, MS, FVRS, FAICO(VR) » 31-Oct-2024

Oct 31 2024 by AVIK DEY SARKAR, MS, FVRS, FAICO(VR)

A 43-year-old hypertensive patient, diagnosed with Non-Ischemic Central retinal vein Occlusion in OS, presented with a striking anatomical variation in retinal vasculature. The inferior first-order retinal arteriole after initiating from the optic disc bifurcates, before reaching the fovea, and the superior branch after crossing the midline forms the superior arcade afterwards and produces dichotomous branching as usual. This defies basic anatomical considerations for retinal vasculature as they never cross the midline, also known as the watershed line for retinal vessels.1,2 References: 1. May CA, Rutkowski P. The Horizontal Raphe of the Human Retina and its Watershed Zones. Vision. 2019; 3(4):60. 2. May CA, Rutkowski P. Hypothesis: watershed zones in the human eye are a key for understanding glaucomatous retinal damage. Med Hypotheses. 2017;109:1-5.

Photographer: Dr. Avik Dey Sarkar, MBBS, MS, FVRS, FAICO, Consultant, Department of Vitreoretinal Services, Aravind Eye Hospital, Madurai, India

Imaging device: Wide angled Fundus imaging with Clarus 300

Condition/keywords: background diabetic retinopathy (BDR), Diabetic Retinopathy, retina, vascular anomaly