5B55.0ICD-11 MMS 2026-01
Vitamin A deficiency with night blindness
Description
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.
Index terms
- Vitamin A deficiency with night blindness
Exclusions from above levels
Sibling codes
5B55.1– Vitamin A deficiency with conjunctival xerosis5B55.2– Vitamin A deficiency with conjunctival xerosis and Bitot's spots5B55.3– Vitamin A deficiency with corneal xerosis5B55.4– Vitamin A deficiency with corneal ulceration or keratomalacia5B55.5– Vitamin A deficiency with xerophthalmic scars of cornea or blindness5B55.Y– Vitamin A deficiency with other specified manifestations5B55.Z– Vitamin A deficiency, unspecified
Foundation entity
Vitamin A deficiency with night blindness – http://id.who.int/icd/entity/1040403412
Part of: 5B55: Vitamin A deficiency › 05: Endocrine, nutritional or metabolic diseases