title: Duration of self assessed benefit of cataract extraction: a long term study.
abstract: OBJECTIVE
  To investigate how long patients' improved visual function lasts after a cataract extraction.
  
  
  METHODS
  Patients' self assessed visual function was evaluated using the Catquest questionnaire both before and 6 months after a cataract extraction. The study population consisted of 615 patients undergoing a cataract extraction during 1995-2002. A final follow up with a new questionnaire was performed in 2003, between 1 year and 8 years after surgery.
  
  
  RESULTS
  445 (72.4%) patients were alive at follow up and agreed to participate in the study. The number of subjects still showing improved visual function after surgery decreased with longer follow up. After 7 years, 80% had improved visual function compared with before surgery. 50% of all originally operated subjects were alive 7 years postoperatively and enjoyed better visual function than they had done before surgery. Ocular co-morbidity in the operated eye or self assessed poor visual function before surgery was significantly related to deteriorated visual function at follow up.
  
  
  CONCLUSIONS
  The number of subjects who experienced improved visual function after a cataract extraction decreased over the course of time postoperatively. Presence of ocular co-morbidity was significantly related to worsened function.
authors: Department of Ophthalmology, Blekinge Hospital, SE-371 85 Karlskrona, Sweden. mats.lundstrom@ltblekinge.se
authors: M
authors: M
authors: Lundström
authors: E
authors: E
authors: Wendel
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000150:complications; D002387:Cataract Extraction / Q000534:rehabilitation*; D004185:Disability Evaluation; D005128:Eye Diseases / Q000150:complications; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D017060:Patient Satisfaction; D018918:Phacoemulsification / Q000534:rehabilitation; D011184:Postoperative Period; D011379:Prognosis; D016896:Treatment Outcome; D014792:Visual Acuity