Table 2. Number and proportion of patients with preoperative blindness or severe visual impairment,^a by region of the World Health Organization (WHO) and Human Development Index (HDI).

WHO region	HDI
	Low			Middle-low			Middle-high			Very high			All
	Total	< 6/60 (%)		Total	< 6/60 (%)		Total	< 6/60 (%)		Total	< 6/60 (%)		Total	< 6/60 (%)
Africa	1272	47		2617	37		200	24		–	–		4089	39
Americas	–	–		–	–		886	17		–	–		886	17
Eastern Mediterranean	–	–		1500	24		200	14		–	–		1700	23
European	–	–		–	–		700	19		200	0		900	15
South-East Asia	–	–		1073	26		1200	32		–	–		2273	29
Western Pacific	–	–		300	42		700	21		200	2		1200	23
Total	1272	47		5490	32		3886	23		400	1		11 048b	29

^a Visual acuity < 6/60 in the better eye.

^b Visual acuity data available for 11048 individuals.