Comparison Of Collamer Toric Implantable Contact Lens Implantation And Laser In Situ Keratomileusis For Lower-To- Moderate Myopic Astigmatism

To compare the postoperative visual outcomes after implantation of a Collamer toric implantable contact lens (ICL) and after LASIK in lower-to- moderate myopic astigmatism.

Chengdu Aier Eye Hospital,Chendgu ,China

This study comprised 62 eyes (47 patients) having toric ICL implantation and 35 eyes (21 patients) having LASIK (Alcon EX500) to correct lower-to-moderate myopic astigmatism (manifest spherical equivalent [SE] <or=-6.0 diopters [D]; manifest refractive cylinder >or=2.0 D). The safety, efficacy, predictability, stability, and adverse events were assessed preoperatively and 1 week and 1, 3, and 6 months postoperatively.

At 6 months ,the mean safety index was 1.14±0.10 in the ICL group and 1.12±0.12 in the LASIK group and the mean efficacy index, 1.12±0.20 and 1.12±0.12 , respectively. 93.54% of eyes in the ICL group and 97.1% of eyes in the LASIK group were within±0.50D of the targeted SE correction at 6 months. 95.1% eyes in the ICL group and 97.1% of eyes in the LASIK group were within±0.50D of the targeted cylinder correction at 6 months. The mean change in manifest refraction from 1 week to 6 months was -0.07+/-0.13 D in the ICL group and -0.03+/-0.12 D in the LASIK group. There were no significant complications in the ICL group; No eyes in the LASIK group required enhancement ablations.

Toric ICL implantation and LASIK was better in eyes with lower-to-moderate myopic astigmatism in almost all measures of safety, efficacy, predictability, and stability, suggesting that toric ICL implantation may become a viable surgical option to treat  lower-to- moderate  myopic astigmatism.