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Refractive error based on the participants’ responses (N = 6,580).
| n (%) | |
|---|---|
| Type of refractive error | |
| Myopia | 2,004 (30.5) |
| Hyperopia | 320 (4.9) |
| Astigmatism | 764 (11.6) |
| Not known | 1,053 (16.0) |
| No refractive error | 2,439 (37.5) |
| Device used for refractive error correction | |
| Spectacles | 1,623 (24.7) |
| Contact lens | 116 (1.8) |
| Contact lens and spectacles (Both) | 554 (8.4) |
| Surgery | 202 (3.1) |
| None | 462 (7.0) |
| Not applicable | 3,623 (55.1) |
| Past refractive surgery | |
| Yes | 535 (8.1) |
| No | 6,045 (91.9) |
