XXXX in Nigerian adults: prevalence, type, and spectacle coverage.

@entity1 @entity227 @entity2516 @entity1939 @entity1714
PURPOSE: To provide data on prevalence and types of @entity2516 and the spectacle-wearing rate among adults in Nigeria and the degree to which the need for distance correction could be met by off-the-shelf spectacles. METHODS: Multistage, stratified, cluster random sampling with probability proportional to size was used to identify a nationally representative sample of 15,027 @entity1 aged >= 40 years. Distance vision was measured using a reduced logMAR tumbling-E chart. All @entity1 underwent autorefraction, and those with presenting acuity of <6/12 in one or both eyes had their corrected acuity measured and underwent detailed clinical examination to determine the cause. RESULTS: Included in the survey were 13,599 (89.9%) of the 15,122 @entity1 aged >= 40 years who were enumerated. Uncorrected @entity2516 was responsible for 77.9% of mild @entity227 (<6/12-6/18), 57.1% of moderate @entity227 (<6/18-6/60), 11.3% of severe @entity227 (<6/60-3/60), and 1.4% of @entity1939 (<3/60). The crude prevalence of @entity1714 ( <=0.5 D) and high @entity1714 ( <=5.0 D) were 16.2% and 2.1%, respectively. Spectacles could improve the vision of 1279 (9.4%) and 882 (6.5%) @entity1 at the 6/12 and 6/18 level, respectively, but only 3.4% and 4.4% of these individuals wore spectacles to the examination site. Approximately 2,140,000 adults in Nigeria would benefit from spectacles that improved their vision from <6/12 to >= 6/12. More than a third of the need could be met by low-cost, off-the-shelf spectacles. CONCLUSIONS: Uncorrected @entity2516 are an important cause of @entity227 in Nigeria, and services must be dramatically improved to meet the need.
