title: Corneal aberrations and objective visual quality after hyperopic laser in situ keratomileusis using the Esiris excimer laser.
abstract: OBJECTIVE
  To evaluate the changes in visual performance and ocular optical quality after hyperopic laser in situ keratomileusis (LASIK) using the Esiris excimer laser (Schwind eye-tech-solutions).
  
  
  METHODS
  Vissum-Instituto Oftalmológico de Alicante, Alicante, Spain.
  
  
  METHODS
  Excimer laser surgery was performed with the Esiris laser in 51 eyes of 29 patients with hyperopia or hyperopic astigmatism. The follow-up was 6 months. Changes in visual acuity, refraction, and corneal and ocular wavefront aberrations (6.0 mm pupil) were recorded and analyzed.
  
  
  RESULTS
  The mean preoperative sphere was +4.45 diopters (D)+/-1.08 (SD) (range +2.50 to +7.25 D) and the mean preoperative cylinder, -0.55+/-0.36 D (range 0.00 to 1.00 D). Ten eyes (19.61%) had a LASIK enhancement during the follow-up for the correction of the residual refractive error and were excluded from the refractive analysis. Of the 41 remaining eyes, 95.12% had the same or improved distance best spectacle-corrected visual acuity (BSCVA) 6 months after surgery; 90.25% had no change or a gain of lines of near BSCVA. Moreover, 80.50% of eyes were within +/-0.50 D of emmetropia. Regarding corneal aberrations, statistically significant changes were observed in higher-order aberrations (HOAs), coma-like aberrations, and the primary spherical aberration coefficient Z(4,0), which changed from positive to negative values (all P<.01). Regarding total ocular aberrations, statistically significant changes were observed in total and higher-order root-mean-square values (P<.01).
  
  
  CONCLUSIONS
  Hyperopic LASIK using the Esiris excimer laser for the correction of 2nd-order aberrations was safe and effective. Ocular and corneal HOAs increased significantly postoperatively.
authors.affiliation: Vissum-Instituto Oftalmológico de Alicante, Universidad Miguel Hernández, Alicante, Spain. jlalio@vissum.com
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Alió
authors.forename: David P
authors.initials: DP
authors.lastname: Piñero
authors.forename: María José Ayala
authors.initials: MJ
authors.lastname: Espinosa
authors.forename: María José García
authors.initials: MJ
authors.lastname: Corral
mesh_terms: D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000503:physiopathology / Q000601:surgery; D003319:Corneal Stroma / Q000503:physiopathology / Q000601:surgery*; D019781:Corneal Topography; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000601:surgery*; D020731:Keratomileusis, Laser In Situ / Q000295:instrumentation / Q000379:methods*; D054018:Lasers, Excimer; D008875:Middle Aged; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology*; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*