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What is In xerophthalmia classification X2 stage is - and explain in detail?
xeraphthalmia:- *The most characteristic and specific signs of vitamin A deficiency are eye lesions. *These develop before the age of 2years. *The term xerophthalmia comprises all the occular manifestations of vitamin A deficiency. WHO classification (1982) *The new xerophthalmia classification is as follows: *XN Night blindness *X1A Conjunctival xerosis *X1B Bitot's spots *X2 Corneal xerosis *X3A Corneal ulceration affecting less than one-third corneal surface. *X3B Corneal ulceration affecting more than one-third corneal surface. *XS Corneal scar due to xerophthalmia XF Xerophthalmic fundus. Ref: Khurana 7th/e p.487