title: Reading performance after implantation of a modified corneal inlay design for the surgical correction of presbyopia: 1-year follow-up.
abstract: OBJECTIVE
  To evaluate change in different reading performance parameters after monocular ACI7000PDT corneal inlay implantation for the improvement of near and intermediate vision.
  
  
  METHODS
  Prospective, interventional case series.
  
  
  METHODS
  Twenty-four patients were scheduled for corneal inlay implantation in the nondominant eye in a university outpatient surgery center. Naturally emmetropic and presbyopic patients between 45 and 60 years of age, with uncorrected distance visual acuity of at least 20/20 in both eyes, without any additional ocular pathology were eligible for inclusion. Bilateral uncorrected reading acuity, mean and maximum reading speed, and smallest log-scaled print size were evaluated with the standardized Radner Reading Charts. Measurements of reading parameters and reading distance were performed with the Salzburg Reading Desk (SRD). Minimum postoperative follow-up was 12 months.
  
  
  RESULTS
  The reading desk results showed significant changes in each parameter tested. After 12 months the mean reading distance changed from the preoperative value of 46.7 cm (95% CI: 44.1-49.3) to 42.8 cm (95% CI: 40.3-45.3, P < .004), and the mean reading acuity "at best distance" improved from 0.33 logRAD (95% CI: 0.27-0.39) to 0.24 logRAD (95% CI: 0.20-0.28, P < .005). Mean reading speed increased from 141 words per minute (wpm, 95% CI: 133-150) to 156 wpm (95% CI: 145-167, P < .003), maximum reading speed increased from 171 wpm (95% CI: 159-183) to 196 wpm (95% CI: 180-212, P = .001), and the smallest print size improved from 1.50 mm (95% CI: 1.32-1.67) to 1.12 mm (95% CI: 1.03-1.22, P < .001).
  
  
  CONCLUSIONS
  After ACI7000PDT implantation, there were significant changes in all tested reading performance parameters in emmetropic presbyopic patients. These 1-year results indicate that the inlay seems to be an effective treatment for presbyopia.
authors: University Eye Clinic, Paracelsus Medical University, Salzburg, Austria. a.dexl@salk.at
authors: Alois K
authors: AK
authors: Dexl
authors: Orang
authors: O
authors: Seyeddain
authors: Wolfgang
authors: W
authors: Riha
authors: Melchior
authors: M
authors: Hohensinn
authors: Theresa
authors: T
authors: Rückl
authors: Wolfgang
authors: W
authors: Hitzl
authors: Günther
authors: G
authors: Grabner
mesh_terms: D003319:Corneal Stroma / Q000601:surgery*; D019781:Corneal Topography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D011145:Polyvinyls; D011305:Presbyopia / Q000503:physiopathology / Q000601:surgery*; D011446:Prospective Studies; D019736:Prostheses and Implants; D011474:Prosthesis Design; D019919:Prosthesis Implantation; D011932:Reading; D012029:Refraction, Ocular / Q000502:physiology; D011795:Surveys and Questionnaires; D014792:Visual Acuity / Q000502:physiology*; D005465:Fluorocarbon Polymers
chemical_list: D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers