Vision Improvement with Refractive Correction Does Not Completely Exclude Major Eye Diseases: Analyses of Visually Impaired South Korean Population in the Korea National Health and Nutrition Examination Survey 2009–2011
Table 3
Age distribution according to visual improvement after refractive correction.
Best-corrected visual acuity
<20/60 (group 1)
≥20/60 and <20/25 (group 2)
≥20/25 (group 3)
value
N
%
SE
N
%
SE
N
%
SE
Age (yrs)
<.0001
5–9
7
0.77%
(0.30)
23
3.04%
(0.74)
106
4.64%
(0.64)
10–18
5
0.79%
(0.41)
15
3.49%
(1.16)
391
25.30%
(1.33)
19–29
17
5.53%
(1.58)
8
3.13%
(1.17)
229
20.47%
(1.35)
30–39
30
5.85%
(1.19)
14
3.00%
(0.91)
195
12.57%
(1.10)
40–49
43
9.27%
(1.72)
21
6.08%
(1.43)
183
13.00%
(0.99)
50–59
68
12.87%
(1.66)
46
8.81%
(1.50)
181
10.31%
(0.89)
60–69
143
15.80%
(1.48)
151
20.02%
(1.81)
185
7.35%
(0.64)
70–
400
49.12%
(2.69)
394
52.43%
(2.38)
176
6.35%
(0.62)
value was obtained using the chi-squared test. Visual impairment was based on the eye with worse presenting visual acuity. N: number; SE: standard error.
