Comparison of clinical outcomes after femtosecond laser in situ keratomileusis in eyes with low or high myopia
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Ji Eun Lee. Department of Ophthalmology, School of Medicine, Pusan National University, Mulgumup, Yangsan 50612, Gyeongnam Province, Republic of Korea. jiel75@hanmail.net

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    Abstract:

    AIM: To compare the clinical results of femtosecond (FS) laser in situ keratomileusis (LASIK) in high myopic patients and low myopic patients. METHODS: This study included 212 myopic eyes undergoing LASIK using a VisuMax 500kHz FS laser. All treated eyes were assigned to one of two groups according to preoperative manifest spherical refraction: low myopia group (A, >?4.0 D) and high myopia group (B, ≤?4.0 D). Uncorrected and corrected distance visual acuity (UDVA, CDVA), refractive errors, and higher-order aberrations (HOAs) were measured preoperatively and 1wk, 1, 3 and 6mo postoperatively. RESULTS: At 6mo of follow-up, 92% and 76% had a UDVA of 20/20 or better in group A and B, respectively (P=0.037) and UDVA was significantly different between two groups (P=0.042). Six and seven percentage lost one line of CDVA in group A and B, respectively (P=0.572) and no eyes in both groups lost more than two lines. Each group had 87% and 76% of treated eyes within ±0.5 D of the intended correction (P=0.186), and 13% and 43% with a change of >0.50 D in spherical equivalent from 1wk to 6mo postoperatively (P=0.005). In terms of postoperative astigmatism, each group had 89.1% and 76.6% within ±0.50 D, respectively and there was significant difference (P=0.006). Group A tends to induce smaller HOAs than group B. CONCLUSION: FS LASIK is effective and safe for correcting high myopia as well as low myopia. However, high myopic eyes showed more postoperative astigmatism and HOAs which affect visual acuity.

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Su Hwan Park, Cheng-Ye Che, Sung Il Kim, et al. Comparison of clinical outcomes after femtosecond laser in situ keratomileusis in eyes with low or high myopia. Int J Ophthalmol, 2020,13(11):1780-1787

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Publication History
  • Received:September 27,2019
  • Revised:March 23,2020
  • Adopted:
  • Online: September 17,2020
  • Published: