Custom ablations in irregular corneas
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First Author: M.Bohac CROATIA
Co Author(s): K. Gabric I. Gabric
To report efficacy and safety of custom excimer laser ablations in highly irregular corneas.
University Eye Hospital 'Svjetlost', Zagreb, Croatia
Case series of 48 eyes that underwent either corneal or ocular wavefront excimer laser ablation.Corneal irregularities were caused by previous corneal refractive surgery(27 eyes),primary keratoconus(8 eyes), herpetic keratitis (4 eyes) and trauma(9 eyes). In majority of refractive surgery complications were flap was intact relift was performed;while in cases of irregular flap, keratoconus, herpetic keratitis and trauma transPRK was performed.All ablations were performed on Schwind Amaris 750S excimer laser using the SCHWIND Combi Wavefront Analyzer.Ablation type was chosen depending on the ablation profile and amount of tissue needed to perform the ablation.Ectatic disorders were treated in combination with same session CXL.
In all eyes significant improvement in corneal regularity, together with gain in corrected distance visual acuity (CDVA) and significant decrease in visual disturbances were observed. Average gain in CDVA was 3 lines (range 2-6 lines). The least predictable results were observed in central steep islands.
Improvement in understanding of ablation customization together with improvement in excimer laser software led to significant improvement in refractive predictability of custom ablations.