5B55.0
category
Vitamin A deficiency with night blindness
Definition
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.
Also indexed as
Vitamin A deficiency with night blindness
Nearby in Vitamin A deficiency
5B55.1Vitamin A deficiency with conjunctival xerosis5B55.2Vitamin A deficiency with conjunctival xerosis and Bitot's spots5B55.3Vitamin A deficiency with corneal xerosis5B55.4Vitamin A deficiency with corneal ulceration or keratomalacia5B55.5Vitamin A deficiency with xerophthalmic scars of cornea or blindness4B4YOther specified diseases of the immune system4B4ZDiseases of the immune system, unspecified