RESUMO
Purpose: Visual performance following toric intraocular lens implantation for cataract with moderate and severe astigmatism
Setting: Cataract services, Shroff Eye Centre, New Delhi, India
Design: Case series
Method: This prospective study included 64 eyes of 40 patients with more than 1.50 dioptre [D] of pre-existing corneal astigmatism undergoing phacoemulsification with implantation of the AcrySof[registered sign] toric IntraOcular Lens [IOL]. The unaided visual acuity [UCVA], best corrected visual acuity [BCVA], residual refractive sphere and refractive cylinders were evaluated. Toric IOL axis and alignment error was measured by slit lamp method and Adobe Photoshop [version 7] method. Patient satisfaction was evaluated using a satisfaction questionnaire at 3 months
Results: The mean residual refractive astigmatism was 0.57 D at the final follow-up of 3 months. Mean alignment error was 3.44 degrees [SD = 2.60] by slit lamp method and 3.88 degrees [SD = 2.86] by Photoshop method. Forty-six [71.9%] eyes showed misalignment of 5 degrees or less, and 60 [93.8%] eyes showed misalignment of 10 degrees or less. The mean log MAR UCVA at 1[st] post-op day was 0.172 [SD = 0.02], on 7th post-op day was 0.138 [SD = 0.11], and on 30th post-op day was 0.081 [SD = 0.11]. The mean log MAR BCVA at three months was -0.04 [SD = 0.76]
Conclusion: We believe that implantation of AcrySof[registered sign] toric IOL is an effective, safe and predictable method to correct high amounts of corneal astigmatism during cataract surgery