The influence of cap thickness on visual outcomes in small-incision lenticule extraction

Session Details

Session Title: Presented Poster Session: Keratorefractive Surgery Results II

Venue: Poster Village: Pod 2

First Author: : Ü.Kamış TURKEY

Co Author(s): :    M. Gülmez   B. Küçük                    

Abstract Details

Purpose:

The purpose of this study was to compare visual and refractive outcomes and high-order aberrations (HOAs) changes between 120- or 140-µm cap thickness after SMILE procedure at 12 months post-operative.

Setting:

Retrospective, cross-sectional study Konya Dünyagöz Hospital, Turkey.

Methods:

This study included a total of 94 patients who received SMILE procedure for the treatment of myopia and/or myopic astigmatism. Only the right eye per participant was used for analysis. Participants were randomized to receive SMILE surgery with a 120-µm cap thickness (n=47) and 140-µm cap thickness (n=47). Uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA), refractive outcomes and higher-order aberrations (HOAs), were evaluated during the 12-month follow-up period.

Results:

Forty-seven patients (47 eyes) from group 1 and forty-seven patients (47 eyes) from group 2 completed the study. The mean age and sex distributions did not differ significantly across the groups (p=0.803, p=0.680, respectively). UDVA, CDVA, spherical and cylindrical refraction and the changes in total HOA, spherical aberration, coma and trefoil were similar between both groups at 6 months and 12 months postoperatively. However, the patients with 140-µm cap thickness had more improvement in postoperative UDVA values compared to the patients with 120-µm cap thickness (p=0.005).

Conclusions:

Both 120- and 140-μm cap thickness groups were safe and effective for correction of myopia and astigmatism. The patients with 140-μm cap thickness had better improvement in UDVA values after 12 months follow-up compared to patients with 120-μm cap thickness.

Financial Disclosure:

None