Table 3.

Crude prevalence of visual impairment for the better/worse seeing-eyes and all eyes^* and by age group

Visual impairment	Better-seeing eye, N (%)	All eyes, N (%)
Normal/Mild: better than 20/70	563/586 (96.00)	1077/1171 (92.00)
Among age 19-49 years	412/421 (97.86)	794/841 (94.44)
Among age ≥50 years	150/164 (91.46)	281/328 (85.67)
Moderate: equal to or worse than 20/70 and equal to or better than 20/200	12/586 (2.10)	32/1171 (2.70)
Among age 19-49 years	4/421 (0.95)	15/841 (1.55)
Among age ≥50 years	8/164 (4.88)	19/328 (5.79)
Severe: worse than 20/200 and equal to or better than 20/400	0	0
Among age 19-49 years	0	0
Among age ≥50 years	0	0
Blind: worse than 20/400 to no light perception	11/586 (1.90)	62/1171 (5.30)
Among age 19-49 years	5/421 (1.19)	34/841 (4.04)
Among age ≥50 years	6/164 (3.66)	28/328 (8.54)

^*Visual acuity was available for 1171 eyes of 586 patients of whom 585 patients aged≥18 years