Blindness Registers as Epidemiological Tools for Public Health Planning: A Case Study in Belize

Table 1

WHO levels of visual impairment.

Category	Worse than	Equal to or better than
Mild or no visual impairment		6/18
		3/10 (0.3)
		20/70
Moderate visual impairment	6/18	6/60
	3/10 (0.3)	1/10 (0.1)
	20/70	20/200
Severe visual impairment	6/60	3/60
	1/10 (0.1)	1/20 (0.05)
	20/200	20/400
Blindness	3/60	No light perception
	1/20 (0.05)
	20/400

Categories of visual impairment were defined according to the World Health Organization (WHO) International Classification of Diseases (ICD-10) based on presenting distance visual acuity in the better eye.