Which of the following is not an indicator of significant xerophthalmia problem in community?: (A) Night blindness >1%, (B) Bitot's spots >0.05%, (C) Corneal ulcer>0.05%, (D) None of the above
Answer is D. 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 570