Relation of duration of trichiasis and corneal opacity in 2628 trichiatic eyes of 1452 participants*
| Duration of trichiasis | Corneal opacity | |||
|---|---|---|---|---|
| None | Obscures pupil margin | Covers the cornea | Total | |
| No (%) | No (%) | No (%) | ||
| Using presence of corneal opacity as the outcome, test for trend for duration of the lashes accounting for correlation between eyes, p = 0.0004 | ||||
| *One eye missing report of duration. p<0.001. | ||||
| ⩽1 year | 52 (94.6) | 2 (3.6) | 1 (1.8) | 55 |
| >1–2 years | 142 (89.9) | 9 (5.7) | 7 (4.4) | 158 |
| >2 years | 1895 (78.5) | 232 (9.6) | 288 (11.9) | 2415 |