title: Cataract.
abstract: BACKGROUND
  Cataract accounts for over 47% of blindness worldwide, causing blindness in about 17.3 million people in 1990. Surgery for cataract in people with glaucoma may affect glaucoma control.
  
  
  METHODS
  We conducted a systematic review and aimed to answer the following clinical questions: What are the effects of surgery for age-related cataract without other ocular comorbidity? What are the effects of treatment for age-related cataract in people with glaucoma? What are the effects of surgical treatments for age-related cataract in people with diabetic retinopathy? We searched: Medline, Embase, The Cochrane Library, and other important databases up to October 2007 (BMJ Clinical Evidence reviews are updated periodically; please check our website for the most up-to-date version of this review). We included harms alerts from relevant organisations such as the US Food and Drug Administration (FDA) and the UK Medicines and Healthcare products Regulatory Agency (MHRA).
  
  
  RESULTS
  We found 16 systematic reviews, RCTs, or observational studies that met our inclusion criteria. We performed a GRADE evaluation of the quality of evidence for interventions.
  
  
  CONCLUSIONS
  In this systematic review we present information relating to the effectiveness and safety of the following interventions: cataract surgery alone; cataract surgery with non-concomitant glaucoma surgery; concomitant cataract and glaucoma surgery; diabetic retinopathy treatment with cataract surgery; intracapsular extraction; manual (large or small) incision extracapsular extraction; and phaco extracapsular extraction.
authors.affiliation: Consultant Eye Surgeon, Sunderland Eye Infirmary, Sunderland, UK.
authors.forename: David
authors.initials: D
authors.lastname: Allen
mesh_terms: D001766:Blindness; D002386:Cataract; D002387:Cataract Extraction; D019317:Evidence-Based Medicine; D005901:Glaucoma; D006801:Humans; D015994:Incidence; D007908:Lens, Crystalline