title: Visual acuity outcomes after cataract surgery in patients with age-related macular degeneration: age-related eye disease study report no. 27.
abstract: OBJECTIVE
  To evaluate visual acuity outcomes after cataract surgery in patients with varying degrees of age-related macular degeneration (AMD).
  
  
  METHODS
  Cohort study.
  
  
  METHODS
  A total of 4757 participants enrolled in the Age-Related Eye Disease Study (AREDS), a prospective, multicenter, epidemiological study of the clinical course of cataract and AMD and a randomized controlled trial of antioxidants and minerals.
  
  
  METHODS
  Standardized lens and fundus photographs, performed at baseline and annual visits, were graded by a centralized reading center using standardized protocols for severity of AMD and lens opacities. History of cataract surgery was obtained every 6 months. Analyses were conducted using multivariate logistic regression.
  
  
  METHODS
  The change in best-corrected visual acuity (BCVA) after cataract surgery compared with preoperative BCVA.
  
  
  RESULTS
  Visual acuity results were analyzed for 1939 eyes that had cataract surgery during AREDS. The mean time from cataract surgery to measurement of postoperative BCVA was 6.9 months. After adjustment for age at surgery, gender, type, and severity of cataract, the mean change in visual acuity at the next study visit after the cataract surgery was as follows: Eyes without AMD gained 8.4 letters of acuity (P<0.0001), eyes with mild AMD gained 6.1 letters of visual acuity (P<0.0001), eyes with moderate AMD gained 3.9 letters (P<0.0001), and eyes with advanced AMD gained 1.9 letters (P = 0.04). The statistically significant gain in visual acuity after cataract surgery was maintained an average of 1.4 years after cataract surgery.
  
  
  CONCLUSIONS
  On average, participants with varying severity of AMD benefited from cataract surgery with an increase in visual acuity postoperatively. This average gain in visual acuity persisted for at least 18 months.
authors.affiliation: Clinical Trials Branch, Division of Epidemiology and Clinical Applications, National Eye Institute/National Institutes of Health, Bethesda, Maryland 20892-1204, USA.
authors.forename: Farzin
authors.initials: F
authors.lastname: Forooghian
authors.forename: Elvira
authors.initials: E
authors.lastname: Agrón
authors.forename: Traci E
authors.initials: TE
authors.lastname: Clemons
authors.forename: Frederick L
authors.initials: FL
authors.lastname: Ferris
authors.forename: Emily Y
authors.initials: EY
authors.lastname: Chew
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000975:Antioxidants / Q000008:administration & dosage; D002386:Cataract / Q000145:classification / Q000150:complications / Q000503:physiopathology* / Q000628:therapy; D002387:Cataract Extraction; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008268:Macular Degeneration / Q000145:classification / Q000150:complications / Q000503:physiopathology* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011788:Quality of Life; D014131:Trace Elements / Q000008:administration & dosage; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*
chemical_list: D000975:Antioxidants; D014131:Trace Elements
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