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Table 4 Prevalence of presenting blindness in regions where all age groups within the population have been surveyed.

From: Prevalence and causes of visual impairment in a Brazilian population: The Botucatu Eye Study

Year Author Location Sample Size Prevalence of Blindness
2006 Fotouhi et al [14] Tehran, Iran 4565 0.39%
2006 Schemann et al [22] Cape Verde Islands 3374 0.8%
2007 Shahriari et al [23] Zahedan, Iran 5446 0.79%
Current Schellini et al Botucatu, Brazil 2485 2.2%
  1. Presenting blindness is defined as presenting visual acuity < 3/60 in the better eye.