Serum retinol below which level is considered to be an indicator for xerophthalmia?
Correct Answer: 10 mcg/ dl
Description: The following are the prevalence criteria for determining xerophthalmia problem: Criteria Prevalence in 6 month to 6 years population Night blindness >1% Bitot's spots >0.5% Corneal xerosis/ulceration >0.01% Corneal ulcer >0.05% Serum retinol <10 mcg/dl >5% Ref: Park 22nd edition, page 571
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