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Comparison of IOL powers obtained by OCT, optical biometry and ray tracing after myopic refractive surgery

Poster Details

First Author: J.Ashar INDIA

Co Author(s):                        

Abstract Details


To compare the emmetropic IOL power calculation after myopic LASIK using OCT (Optovue), optical biometry (AL �â�€�“ Scan, Nidek- Schammas PL formula) & ray tracing (Sirius, CSO)


Mumbai Eye Care


30 post myopic LASIK eyes were evaluated for biometry. IOL power nearest to emmetropia was noted (A constant 118.9) using above machines & compared


Mean emmetropic IOL powers using OCT, AL- scan & Sirius were 22.48D, 22.7D & 21.43. (OCT vs Al �â�€�“ scan �â�€�“ Not significant, OCT vs Sirius and AL- scan vs Sirius p < 0.005)


OCT based IOL power calculation correlated well with optical biometry, but that using ray tracing was significantly different and more hyperopic

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