title: Prevalence and causes of blindness at a tertiary hospital in Douala, Cameroon.
abstract: OBJECTIVE
  The aim of this study was to determine the prevalence and causes of bilateral and unilateral blindness in the town of Douala and its environs based on data from the ophthalmic unit of a tertiary hospital in Douala.
  
  
  METHODS
  We conducted a retrospective epidemiological survey of consultations at the eye unit of the Douala General Hospital over the last 20 years (from January 1, 1990 to December 31, 2009).
  
  
  RESULTS
  Out of the 1927 cases of blindness, 1000 were unilateral, corresponding to a hospital prevalence of 1.84% and 927 cases were bilateral, corresponding to a hospital prevalence of 1.71%. No statistically significant difference was noted between the two (P = 0.14). The leading causes of bilateral blindness were cataract (50.1%), glaucoma (19.7%), and diabetic retinopathy (7.8%) while the leading causes of unilateral blindness were cataract (40.4%), glaucoma (14.1%), and retinal detachment (9.1%). Cataract (51.2%), cortical blindness (16.3%), and congenital glaucoma (10%) were the leading causes of bilateral blindness in children aged less than 10 years.
  
  
  CONCLUSIONS
  Blindness remains a public health problem in the Douala region with a hospital prevalence which is relatively higher than the national estimate given by the National Blindness Control Program.
authors.affiliation: Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon.
authors.forename: André Omgbwa
authors.initials: AO
authors.lastname: Eballé
authors.forename: Côme Ebana
authors.initials: CE
authors.lastname: Mvogo
authors.forename: Godefroy
authors.initials: G
authors.lastname: Koki
authors.forename: Nyouma
authors.initials: N
authors.lastname: Mounè
authors.forename: Cyrille
authors.initials: C
authors.lastname: Teutu
authors.forename: Augustin
authors.initials: A
authors.lastname: Ellong
authors.forename: Assumpta Lucienne
authors.initials: AL
authors.lastname: Bella