AIM: To re-survey the Gambia after an interval of 10 years to assess the impact of a national eye care programme (NECP) on the prevalence of blindness and low vision. METHOD: Comparison of two multistage cluster random sample surveys taking into account the marked increase in population in the Gambia, west Africa. Samples of the whole population in 1986 and 1996 were taken. The definition of blindness is presenting vision less than 3/60 in the better eye, or visual fields constricted to less than 10 degrees from fixation. Low vision is less than 6/18 but 3/60 or better. Causes of blindness were determined clinically by three ophthalmologists. RESULTS: The crude prevalence of blindness fell from 0.70% to 0.42%, a relative reduction of 40%. During the same 10 year period, the population increased by 51% from 775 000 to 1 169 000. When the results were standardised for age, a west to east gradient was found for changes in risk of blindness over the 10 year period. This matched the phased west to east introduction of the NECP interventions. There was a modest but significant increase in the risk of low vision across the whole country. CONCLUSIONS: The overall reduction in risk of blindness, in those areas where the NECP has been active, appears to justify the programme and the support of donor organisations. The low vision cases due to cataract must now be addressed.
RCT Entities:
AIM: To re-survey the Gambia after an interval of 10 years to assess the impact of a national eye care programme (NECP) on the prevalence of blindness and low vision. METHOD: Comparison of two multistage cluster random sample surveys taking into account the marked increase in population in the Gambia, west Africa. Samples of the whole population in 1986 and 1996 were taken. The definition of blindness is presenting vision less than 3/60 in the better eye, or visual fields constricted to less than 10 degrees from fixation. Low vision is less than 6/18 but 3/60 or better. Causes of blindness were determined clinically by three ophthalmologists. RESULTS: The crude prevalence of blindness fell from 0.70% to 0.42%, a relative reduction of 40%. During the same 10 year period, the population increased by 51% from 775 000 to 1 169 000. When the results were standardised for age, a west to east gradient was found for changes in risk of blindness over the 10 year period. This matched the phased west to east introduction of the NECP interventions. There was a modest but significant increase in the risk of low vision across the whole country. CONCLUSIONS: The overall reduction in risk of blindness, in those areas where the NECP has been active, appears to justify the programme and the support of donor organisations. The low vision cases due to cataract must now be addressed.
Authors: P J Dolin; H Faal; G J Johnson; D Minassian; S Sowa; S Day; J Ajewole; A A Mohamed; A Foster Journal: Lancet Date: 1997-05-24 Impact factor: 79.321
Authors: M A van der Sande; R Bailey; H Faal; W A Banya; P Dolin; O A Nyan; S M Ceesay; G E Walraven; G J Johnson; K P McAdam Journal: Trop Med Int Health Date: 1997-11 Impact factor: 2.622
Authors: Emma M Harding-Esch; Tansy Edwards; Ansumana Sillah; Isatou Sarr; Chrissy H Roberts; Paul Snell; Esther Aryee; Sandra Molina; Martin J Holland; David C W Mabey; Robin L Bailey Journal: PLoS Negl Trop Dis Date: 2009-12-22
Authors: P Courtright; A Hoechsmann; N Metcalfe; M Chirambo; K Noertjojo; J Barrows; J Katz; A Hoeshcmann Journal: Br J Ophthalmol Date: 2003-09 Impact factor: 4.638
Authors: Emma M Harding-Esch; Tansy Edwards; Harran Mkocha; Beatriz Munoz; Martin J Holland; Sarah E Burr; Ansumana Sillah; Charlotte A Gaydos; Dianne Stare; David C W Mabey; Robin L Bailey; Sheila K West Journal: PLoS Negl Trop Dis Date: 2010-11-02
Authors: E M Harding-Esch; T Edwards; A Sillah; I Sarr-Sissoho; E A Aryee; P Snell; M J Holland; D C Mabey; R L Bailey Journal: Trans R Soc Trop Med Hyg Date: 2008-05-27 Impact factor: 2.184