Dr. Somak Mazumdar, M12941, Dr. Shyamashree Sil
Purpose:To find out the underlying ultrastructural morphoanatomical derangements associated with macular ischemia (MI) and its area wise correlation.
Results:Retrospective study of 125 eyes with MI (detected on FFA) done with SD OCT over 6 months. Vision and IOP noted. Etiologies found mostly diabetic retinopathy (55%). Area of MI calculated quadrant (q) wise from the centre of the FAZ and found 1q=39%, 2q=40%, 3q=7% and 4q=14%. Neurosensory changes detected (i)atrophy (NSA; 20%, thickness<200micron);(ii)CME (70%);(iii)neurosensory RD (NSRD; 26%) and (iv) ERM (4%). Photoreceptors (inner-outer segment junction) changes (57%) were – disrupted (44%), elevated (8%), lost (5%). Area wise 4q MI showed maximum NSA (33%) and photoreceptors anomaly (67%); 3q had most CME (87.5%); 2q had highest NSRD (39%) and 1q had most ERM (8%). Conclusion:SDOCT is quite useful non-invasively in macular ischemia to detect underlying ultrastructural changes with area wise correlation to assess future outcome.