The first sign of Vit A deficiency is :
Modified classification WHO (Xerophthalmia) XN : Night blindness
XIA : Conjunctival xerosis XIB : Bitot’s spots
X2: Corneal xerosis
X3A : Corneal ulceration/keratomalacia less than 1/3rd corneal surface
X3B : Corneal ulceration/keratomalacia equal to or more than 1/3rd corneal surface XS : Corneal scar
XF : Xerophthalmia fundus.
Conjunctiva xerosis
Corneal ulcer
Keratomalacia
Bitot’s spot