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front |1 |2 |3 |4 |5 |6 |7 |8 |9 |10 |11 |12 |13 |14 |15 |16 |17 |18 |19 |20 |21 |22 |23 |24 |25 |26 |27 |28 |29 |30 |31 |review |
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Prevalence: - 0.125-0.25% in Western world - 0.2-1.5% (av 0.75%) in Asia - 0.3-3.1% (av 1.2%) in Africa Allen Foster in Clinical Ophthalmology - Duane, ed. (1991) |