The Visual Ability Score (VAS) can be used to evaluate visually impaired children. It is based on the child's ability to perform 16 visual activities in her or his daily environment. The authors are from the Schepens Eye Research Institute in Boston.
There are 16 questions about daily visual activities (answered "Yes" or "No").
Questions
Points for Yes
Points for No
1 to 14
1
0
15 and 16
0
1
visual ability score =
= SUM(points for all 16 questions)
Interpretation:
• minimum score: 0
• maximum score: 16
• The higher the score, the greater the visual acuity.
Score
Approximate Snellen Acuity
1
20/5093
2
20/3881
3
20/3767
4
20/3468
5
20/2218
6
20/1607
7
20/1140
8
20/820
9
20/586
10
20/509
11
20/388
12
20/306
13
20/223
14
20/172
15
20/83
16
20/49
from Table 3, page 53
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