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5B55.0 Vitamin A deficiency with night blindness

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Night blindness (poor adaptation to darkness) is generally the earliest manifestation of vitamin A deficiency. In mild cases, night blindness is apparent only after photic stress. Affected children no longer move around after dusk and prefer to sit in a secure corner, often unable to find their food or toys. Night blindness of recent onset in a preschool child is practically pathognomonic of vitamin A deficiency. All patients respond rapidly to therapy with vitamin A, usually within 48 hours.

synonyms

• Vitamin A deficiency with night blindness

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