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Distribution of causes of unilateral visual impairment by age and sex.
| Refractive error | Corneal opacity | Retinal disease | Maculopathy | Old uveitis | Phthisis bulbi | |
|---|---|---|---|---|---|---|
| Age group | ||||||
| <20 | 3 | – | – | 1 | – | – |
| 20–29 | 9 | – | 4 | 4 | 2 | 2 |
| 30–39 | – | 1 | – | – | – | 1 |
| Sex | ||||||
| Male | 9 | 1 | 3 | 4 | – | 3 |
| Female | 3 | – | 1 | 1 | 2 | – |
