Briefly explain the clinical features of vitamin A deficiency and Iodine deficiency disorder.

Clinical features of vitamin A deficiency

Vitamin A deficiency is the leading cause of preventable blindness in children worldwide.

• Impaired dark adaptation (night blindness) due to lack of the photoreceptor pigment rhodopsin.
• Xerophthalmia: dry, thickened conjunctiva and cornea
• Bitot spots: keratinized growths ___ ____ _________ ____ _____ _________ ________ __________.
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