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Guillermo Garcia, Angie De la Mota, Arturo J Ramirez-Miranda, Alejandro Navas, Enrique O Graue; Visual, Refractive, Clinical and Posterior Corneal Topographic Outcomes of Small-Incision Lenticule Extraction (SMILE) vs Femto-LASIK (F-LASIK).. Invest. Ophthalmol. Vis. Sci. 2014;55(13):2137.
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To compare visual acuity, refraction, esthesiometry, tear break-up time (T-BUT) and posterior corneal elevation (PF) measurements before and after Small incision lenticule extraction (SMILE) and Femto-LASIK
Consecutive case series, randomized, eye-to-eye study. Eyes underwent SMILE or F-LASIK for myopic treatments. Follow-up was performed at day 1, 7, 30, 90, 6 and 12 months. UDVA, BCVA, T-BUT, corneal sensation and Scheimpflug tomography were assessed at each visit. Paired T-test was used to compare pre and postoperative data.
42 eyes of 21 patients enrolling in the study. At day 1 PF measured was not statistically significant (P>0.58) however over time, PF was statistically significant (p < 0.01) with a greater change in patients treated with femtosecond lenticule extraction. There was no difference in BCVA, sphere and cylinder. However there was a statistical significant difference in spherical equivalent. At 6 months differences in UDVA and SE remained statically significant (P < 0.05), mean corneal esthesiometry values were similar in both groups (P= 0.65). On the questionnaire, SMILE was superior to LASIK but no statistical differences were encountered.
SMILE showed more changes in the posterior elevation with a progressive backward shift throughout time during follow-up. SMILE and F-LASIK provides similar results in myopic patients regarding visual acuity, refraction, and dry eye symptoms
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