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

BMC Ophthalmology

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

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%

Presenting blindness is defined as presenting visual acuity < 3/60 in the better eye.

ISSN: 1471-2415