Xerophthalmia is a serious eye disorder that results from vitamin A deficiency. It can lead to permanent blindness if left untreated. Symptoms Night blindness, or impaired vision in dim light Dry eyes Thickening of the conjunctiva Wrinkling of eye tissues Tissue deposits on the cornea, known as Bitot's spots Ulcers Corneal xerosis Keratomalacia, or softening of the cornea