Dr.Prerna S Ahuja, P21070
Purpose:To compare accuracy of Bowman’s layer topography measured after epithelium removal with values quantified using preoperative(preop) optical coherence tomography(OCT) images in Keratoconus(KC) patients.
Methods:30 eyes of KC patients were imaged with corneal tomography(Pentacam) and OCT(Optovue).Preop OCT images were used to virtually calculate Bowman’s topography. Epithelium removal was done by a single surgeon and corneal scans were repeated intraoperatively(intraop) to manually measure Bowman’s topography.
Results:The mean K1, K2 and Kmax(D) of Bowman’s topography measured intraop and derived from preop OCT images were similar (48.8±1.58, 48.1±1.59; 55.3±2.05, 54.7±2.27 and 56.4±2.04, 55.8±2.34 respectively).
Conclusion:This novel non-invasive method of determining Bowman’s topography is accurate and comparable to manual de-epithelized(invasive) method. This can potentially improve our screening strategies and possibly treating KC effectively with laser vision correction.
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