[Visual outcomes 5 years after small incision lenticule extraction (SMILE), surgery on spherocylindrical myopia eyes, from 616 eyes].

OBJECTIVE

Determine if the visual criteria of the technique of surgery refractive by Femtosecond Laser-assisted duckweed Extraction - Small Lenticule Extraction (FLEx-Smile), realized in the laser femtosecond VisuMax (Carl Zeiss Meditec, Jena, Germany), are stable, secure, effective and predictable in the long term, to the nearsighted and astigmatic.

MODEL OF THE STUDY

Retrospective study, monocentric with data collected between March 2012 and March 2017.

PARTICIPANTS

The study included 616 eyes of 309 nearsighted and astigmatic patients (spherical equivalent from 1 to 11 D). They were followed in postoperative immediate (D+1), in 3 months, in 1 year and in 5 years. The taken measures include the refraction, the uncorrected visual acuteness (UVAC) and the best visual corrected acuteness (BVAC).

THE PRIMARY AND SECONDARY ASSESSMENT CRITERIA

The criteria of evaluation were based on the BVAC, the refractive stability, the index of security (IS: MAVC to preoperative D+1/BVAC before operation) and the predictability (percentage of eyes in±1 D of SE target).

RESULTS

UVAC was better 5th year than after the intervention (P=0.001) and 88% of the operated eyes had an UVAC in 8/10 (logMAR=0.1). For the stability refractive, the patients became nearsighted between the intervention and 5th year (P=0.001), with a regression of 0.240 D. The indication of safety was better 5th year than the day after the intervention (P=0.001), 92% of eyes operated in 5 years were 0.5 D of SE target and 77% of eyes had lost no line.

CONCLUSION

SMILE is a good technique of surgery refractive stable, secure, effective and predictable on the long term.