Laser-assisted in situ keratomileusis long term outcomes in late adolescence

Abstract

Purpose: Evaluate the long term outcomes of myopic-LASIK in a late adolescent population (age ⩾17 and <20 at the time of surgery). Methods: Monocentric retrospective case series study. Eyes with at least 3 years of follow-up time were included. Primary outcome measures were long term efficacy, safety and stability of the refractive error. Secondary outcome measure was the evaluation of the relation between the postoperative spherical aberration and the long term stability of the refractive error. Results: Forty-seven eyes of 25 patients were included. Mean follow-up was 9.23 ± 3.16 years. Mean age at the time of surgery was 18.74 ± 0.44 years. With time, postoperative UDVA showed a mild but significant deterioration of 1–2 Snellen lines ( p = 0.012), in connection with a mild but significant myopization of the SE (mean increase of −0.43 D; p < 0.001), sphere (mean increase of −0.29 D; p = 0.004) and cylinder (mean increase of −0.16 D; p = 0.013). CDVA remained stable over time ( p > 0.05). Efficacy index decreased from 1.01 to 0.87 in the long term (77% UDVA ⩾ 20/32). Safety remained at 1.06. 66% and 74% of eyes presented a SE within ±0.50 D and ±1.00 D respectively. SE changed over 0.50D in 33% of eyes. No correlation could be detected between the SE and the postoperative spherical aberration. No cases of corneal ectasia were detected. Conclusions: Myopic-LASIK in late adolescence is safe and effective, but a mild myopic progression occurs. Despite presence of refractive stability is preferable, if necessary, myopic LASIK provides relatively good outcomes in the long term in this young population.