Dr. POORNACHANDRA B.

Dr.Santosh Gopi Krishna Gadde, Dr.Naresh Kumar Yadav, Dr. ROHIT SHETTY

Abstract

AIM:To study efficacy of polarization sensitive optical coherence tomography (PS-OCT)

METHODS: PS-OCT with central wavelength 840 nm was used to obtain macula centred raster scans. From the phase retardation and axis orientation, en face maps at four outer layers of retina were created. A total of 50 patients with degenerative retinal disease were studied and compared with normals

RESULTS:A characteristic bow-tie pattern at EZ layer was observed in normal eyes. In diseased cases this pattern was disrupted. Eyes with good central vision (say 6/6), but clinically diagnosed as RP, showed changes in the EZ layer at macula compared to normals. From the distribution analysis of phase retardation maps, it was observed that at all the layers the amount of phase retardation was reduced in eyes with macular atrophy

CONCLUSION: PS-OCT appears to be promising tool in identifying structural changes prior to functional changes, which may offer a great advantage in picking up changes at the earliest

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