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. Author manuscript; available in PMC: 2009 Oct 7.
Published in final edited form as: Invest Ophthalmol Vis Sci. 2008 Apr 25;49(12):5264–5273. doi: 10.1167/iovs.08-1814

TABLE 1.

Sex- and Age-Specific Prevalence of Uncorrected Refractive Error and Unmet Refractive Need among LALES Participants

Sex Frequency (%) Age Group Frequency (%)


Uncorrected
Refractive Error
Improvement
Male
(n = 2556)
Female
(n = 3573)
Total
(n = 6129)
P 40–49
(n = 2361)
50–59
(n = 1853)
60–69
(n = 1189)
70–79
(n = 583)
≥80
(n = 143)
Total
(n = 6129)
P
≥2Lines* 370 (14.5) 556 (15.1) 926 (15.1) 0.24 251 (10.6) 299 (16.1) 244 (20.5) 102 (17.5) 30 (21.0) 926 (15.1) <0.0001

Sex Frequency (%) Age Group Frequency (%)


Unmet Refractive Need Male (n = 869) Female (n = 1536) Total (n = 2405) P 40–49 (n = 538) 50–59 (n = 752) 60–69 (n = 648) 70–79 (n = 384) ≥80 (n = 83) Total (n = 2405) P

Definition1 87 (10.0) 126 (8.2) 213 (8.9) 0.13 41 (7.6) 53 (7.0) 55 (8.5) 41 (10.7) 23 (27.7) 213 (8.9) <0.0001

Sex Frequency (%) Age Group Frequency (%)


Unmet Refractive Need Male (n = 822) Female (n = 1456) Total (n = 2278) P 40–49 (n = 521) 50–59 (n = 715) 60–69 (n = 610) 70–79 (n = 354) ≥80 (n = 78) Total (n = 2278) P

Definition2 88 (10.7) 130 (8.9) 218 (9.6) 0.17 42 (8.1) 54 (7.6) 59 (9.7) 40 (11.3) 23 (29.5) 218 (9.6) <0.0001
*

Uncorrected refractive error was defined as an improvement of two or more lines in visual acuity in the better seeing eye after refraction of the same eye.

Participants, with or without existing correction, who had a presenting visual acuity of worse than 20/40 in the better seeing eye but could achieve 20/40 or better with correction in that same eye.

Participants, with or without existing correction, who had a presenting visual acuity of worse than 20/40 in the better seeing eye but could achieve an improvement in two or more lines with correction in that same eye.