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D.C. Nogueira, W.T. Hida, M.M. Hida, D.C. Wu, M.C. Barbosa, G.S. M. Melo, R.Y. Hida; Incidence of Pterygium in Amazon River Watershed Population . Invest. Ophthalmol. Vis. Sci. 2006;47(13):4986.
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© ARVO (1962-2015); The Authors (2016-present)
To determine incidence rate for pterygium in adult population in Amazon River watershed.
An incidence survey of 231 individuals, who came for general health check–up in a Prefecture Health Project. This study was conducted in five rural villages located in the watershed of Amazon River, Brazil (Vila Bom Sucesso, Comunidade Nossa Senhora do Carmo 1 and 2, Arumã, Comunidade São Francisco) using a portable slit lamp for ophthalmologic examination. Among 231 patients were divided by age into 2 groups: Group 1 (n=88)(under 20 years old) and Group 2 (n=143)(older than 20 years old).
There were 80 males and 151 females, and all of them were Brazilian. The mean age was 26.5 years (SD 17.6). Among 88 patients (38.10%) of Group 1, two individuals (2,27%) were affected with unilateral pterygium. Among 143 patients (61.90%) of Group 2, 77 individuals (53.85%) were affected with pterygium, which 43 individuals (30.10%) were affected with bilateral pterygium
There is higher incidence rate of pterygium in communities located in Amazon River watershed compared to the other studies.
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