Which of the following is not an indicator of significant xerophthalmia problem in community?
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
Night blindness >1%
Bitot's spots >0.05%
Corneal ulcer>0.05%
None of the above