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First Author: A.Al-Ghoul CANADA
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To demonstrate effectiveness of reducing irregular astigmatism from Keratoconus using Cataract Surgery or Refractive Lens Exchange with Toric Intraocular Lenses
Retrospective case series analysis
Fifteen Keratoconic eyes from eight patients who were contact lens intolerant but visually debilitated were included in the study. Patients were given option of either Refractive Lens Exchange or Cataract Removal with Toric Intraocular lens insertion depending on presence of cataracts in the eye. Only if the astigmatism was reliably measured using Pentacam, IOL master, and Auto Keratometry methods were patients offered the procedure.
Eight keratoconic eyes from four patients were deemed eligible for the procedure based on the ability to reliably detect their level of astigmatism as well as axis. There was average of 7.5 Diopter of spherical reduction and 4 Diopter of astigmatic reduction achieved with Toric Intraocular lenses. The preoperative and two week postoperative Best LogMar Corrected Visual Acuity (BCVA) were 0.38 and 0.13 respectively (P<0.05).
Toric Intraocular lenses in combination with Phacoemulsification are an effective modality in reducing spherical and astigmatic error in patients with irregular astigmatism from Keratoconus. Only patients with reliably measured parameters using atleast three diagnostic tools are best suited for this technology.