what are the symptoms of xerophthalmia?
['NIGHT BLINDNESS (XN) Night blindness or defective vision in dim light is the earliest clinical manifestation of Vitamin A Deficiency. ... ', 'CONJUNCTIVAL XEROSIS (X1A) ... ', "BITOT'S SPOTS (X1B) ... ", 'CORNEAL XEROSIS (X2) ... ', 'CORNEAL ULCERATION AND KERATOMALACIA (X3A and X3B) ... ', 'CORNEAL SCAR (XS) ... ', 'XEROPHTHALMIC FUNDUS (XF)']