title: Seven-year follow-up of LASIK for moderate to severe myopia.
abstract: To evaluate long-term refractive outcomes of LASIK for correcting moderate to severe myopia.
  
  
  
  A long-term (7-year) prospective follow-up study of visual and refractive outcomes in patients who underwent myopic LASIK surgery in 1998 and 1999. Fifty-nine patients (104 eyes) of the original cohort of 75 patients underwent detailed clinical assessment at 1 and 7 years postoperatively. The main outcome measures were predictability, efficacy, safety, and stability. Topography, corneal thickness, and postoperative complications were recorded at 7 years. All patients completed a questionnaire assessing their satisfaction with the procedure.
  
  
  
  At 7 years postoperatively, 89.4% of eyes were within 0.50 diopters (D) of attempted correction, and 90.4% were within 1.00 D. All eyes had 20/40 or better vision and 94.2% had 20/20 or better. Best spectacle-corrected visual acuity was unchanged or improved in 80.8% of eyes. Eyes did not regress in refraction between 1 and 7 years postoperatively. Complications were rare and patient satisfaction with the surgery was high.
  
  
  
  LASIK surgery has predictable and stable results in refractive and visual outcomes in correcting moderate to high myopia on long-term follow-up. Refractive stability is maintained over 7 years, with no evidence of progressive late-onset complications.
authors.affiliation: Department of Ophthalmology, Provincial Hospital affiliated with Shandong University, Jinan, China.
authors.forename: Zhaoqiang
authors.initials: Z
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Zhenying
authors.initials: Z
authors.lastname: Cheng
authors.forename: Fang
authors.initials: F
authors.lastname: Zhou
authors.forename: Hua
authors.initials: H
authors.lastname: Jiang
authors.forename: Jinghai
authors.initials: J
authors.lastname: Li
mesh_terms: D000328:Adult; D003319:Corneal Stroma / Q000503:physiopathology / Q000601:surgery*; D019781:Corneal Topography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D017060:Patient Satisfaction; D011183:Postoperative Complications; D011446:Prospective Studies; D013524:Surgical Flaps; D013997:Time Factors; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology