Abstract
BackgroundTo report our experience with small incision lenticule extraction ("SMILE") for myopia treatment.MethodsIn this prospective clinical study, we evaluated 447 eyes from 224 patients with myopia, with and without astigmatism. We followed the patients for 6 months after SMILE.ResultsThe mean (±standard deviation, SD) spherical equivalent was -6.75 ± 1.65 diopters (D) preoperatively and -0.21 ± 0.37 D at 6 months postoperatively. Our data showed that 97.9% of eyes were within ±1.0 D and 86.1% were within ±0.5 D of the intended correction. Furthermore, 79.8% had an uncorrected distance visual acuity (UDVA) of 0 logMAR or less (20/20 or better in the Snellen equivalent) 6 months after surgery. Additionally, 48.5% remained unchanged, 41% gained one line of corrected distance visual acuity (CDVA), 7.2% gained two lines of CDVA, 3.3% lost one line of CDVA, and 0.3% lost two or more lines of CDVA. Age was the only predictor for worsening UDVA at 6 months postoperatively in linear regression analyses (0.07 decrease logMAR per increased 10 years of age; P < 0.05). No predictor showed an association with error in spherical equivalent refraction at 6 months postoperatively.ConclusionsSMILE is an effective and safe refractive surgery. Age was the only predictor that influenced visual outcome, but its effect appeared clinically insignificant. Faster visual recovery is also expected with improved surgical technique.
Highlights
To report our experience with small incision lenticule extraction (“SMILE”) for myopia treatment
There was no significant difference between parameters for the right and left eyes
The present study had a large number of samples, relatively long-term observation, and treated moderateto-severe myopia
Summary
To report our experience with small incision lenticule extraction (“SMILE”) for myopia treatment. The procedure enables faster visual rehabilitation so patients can quickly return to normal activities [1,2]. This procedure has side effects including dry eye [3], ectasia [4], and traumatically loosened flaps [5]. Small incision lenticule extraction (SMILE) has been proposed as an alternative to LASIK that could avoid these potential side effects [6]. It has been reported that SMILE resulted in fewer dry-eye symptoms and higher corneal. We examined predictors that influenced visual outcome as well as the effects of incision length on visual outcome
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