Comparison Of Collamer Toric Implantable Contact Lens Implantation And Smile For Lower-To- Moderate Myopic Astigmatism

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

Chengdu Aier Eye Hospital,Chengdu,China

This study comprised 81 eyes (57 patients) having toric ICL implantation and 77eyes (47 patients) having SMILE (VisuMax 3.0) to correct lower-to-moderate myopic astigmatism (manifest spherical equivalent [SE] <or=-6.0 diopters [D]; manifest refractive cylinder >or=0.75 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 1.16±0.09 in the ICL group and 1.16±0.13 in the SMILE group and the mean efficacy index 1.15±0.10 and1.13±0.13 , respectively. All eyes in the ICL group and 97.41% of eyes in the SMILE group were within±0.50D of the targeted SE correction at 6 months. 98.76% eyes in the ICL group and 100% of eyes in the SMILE 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 -0.03+/-0.11 D in the ICL group and -0.07+/-0.18 D in the SMILE group. There were no significant complications in the ICL group; No eyes in the SMILE group required enhancement ablations.

Toric ICL implantation and SMILE 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.