Dr. SAILI GARGE

Dr. ROHIT SHETTY, Dr. POOJA KHAMAR

Abstract

PURPOSE:To assess corneal collagen distribution pre & post LASIK surgery with Polarization sensitive Optical Coherence Tomography(PS-OCT)

METHODS:45 eyes underwent PS-OCT: pre & post LASIK at 1,3 & 6 months. Phase retardation(PR) enface maps (11mm) were generated. Zonal analysis was performed in annular zones from centre to periphery

RESULTS:PR maps of normal eyes showed preferential arrangement of collagen fibril structures, with least retardation in the apex and increasing radially towards the periphery. At 1-

month, LASIK eyes showed abrupt disruption in this arrangement, due to ongoing

stromal remodelling.38 LASIK eyes showed close to normal arrangement from 3-

months. 7 LASIK eyes showed deviation from the regular arrangement which appeared

to be independent of the refractive error & corneal tomography.

CONCLUSION:Transient changes in collagen arrangement were assessed using PS-OCT. PSOCT can be reliable tool to study & observe corneal wound healing process post operatively.

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