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Results of thin cap SMILE
First Author: S. Taneri GERMANY
Co Author(s): S. Arba-Mosquera A. Rost H. Dick
To evaluate the influence of a thin cap in small incision lenticule extraction (SMILE) for the correction of myopia or myopic-astigmatism
Tertiary care private practice
Chart review of 102 eyes of 51 patients. The effect of 120ﾵm vs 100ﾵm cap thickness on postoperative spherical equivalent refraction (SEq), cylinder, corrected and uncorrected visual acuity, and ease of lenticule separation was assessed in a contralateral manner while all other parameters were identical between eyes (including optical zone, minimum lenticule thickness, incision size, energy and spot settings) using paired Studentﾒs T-test.
At 3 months postoperative, SMILE with 120ﾵm cap thickness was undercorrected in SEq relative to SMILE with 100ﾵm cap thickness. The difference of 0.06 ﾱ 0.39D (or 0.7% ﾱ 5.7%) did not reach statistical significance. Postoperative cylinder was not statistically different in both groups. Visual acuity was similar in both groups. Ease of lenticule separation was identical in both groups. Suction time was shorter with a 100ﾵm cap (p<0.005). Postoperative central residual stromal thickness was 20ﾱ15ﾵm thicker with a 100ﾵm cap (p<0.0001). Adverse events were comparable.
Postoperative refraction, visual acuity, ease of lenticule separation, and incidence of adverse events were not significantly affected by cap thickness. Surgeons may safely use 100ﾵm instead of 120ﾵm caps without nomogram adjustment. Alternatively, after suction loss during the lenticule cut a second docking with a programmed cap thickness of 100ﾵm (and a larger optical zone) may be a rescue technique enabling to still perform the intended SMILE procedure.
receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented
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