Clinical effect of cataract surgery with higher power toric intraocular lens implantation in patients with high corneal astigmatism

Abstract:

AIM:To evaluate the visual and refractive outcomes after higher power toric intraocular lens(IOL) implantation in patients with high amounts of corneal astigmatism. METHODS:This study comprised 21 cases 24 eyes with cataract and more than 2.5 diopters (D) of corneal astigmatism who had toric AcrySof SN60T6, SN60T7, SN60T8 or SN60T9 IOL implantation. The preoperative and postoperative 3 months uncorrected distance visual acuity (UCDVA) and best-corrected distance visual acuity (BCDVA), preoperative corneal astigmatism, residual refractive cylinder and IOL axis and position in postoperative 1 week and 3 months were evaluated. RESULTS:Three months postoperatively, 75％ of eyes showed the 0.5 or better in UCDVA. The preoperative corneal astigmatism was 3.45±0.63D. The postoperative 3 months residual refractive cylinder was 0.72±0.23D(P＜001). The anticipated correction was 3.12±0.54D. The achieved correction was 3.05±0.66D (P＞0.05). The mean Toric IOL misalignment was 3.2°±2.1°. CONCLUSION:Implantation of higher power toric IOL during cataract surgery is a safe, effective and predictable method in correcting high amounts of corneal astigmatism.