E50.1

Clinical Causes: Inadequate dietary intake of vitamin A-rich foods such as liver, dairy products, and orange or green vegetables. Malabsorption issues caused by conditions like celiac disease or cystic fibrosis, which impair vitamin A absorption from the gut. Certain medical conditions that increase vitamin A requirements or utilization, such as infections or chronic illnesses. Lack of access to vitamin A supplementation programs in regions where deficiency is common. Premature birth, where infants do not accumulate sufficient vitamin A stores during pregnancy.

Key Symptoms: Night blindness, which impairs the ability to see in low light conditions. Dryness of the conjunctiva and cornea, leading to a gritty or burning sensation in the eyes. Appearance of Bitot's spots—foamy, whitish patches that develop on the conjunctiva, commonly seen in children. Conjunctival dryness (xerosis) and keratinization of the conjunctiva. In severe cases, corneal ulceration and possible blindness due to corneal damage.

Diagnosis Path: Diagnosis of vitamin A deficiency involves a clinical examination of the eyes, noting specific signs such as Bitot's spots and conjunctival xerosis. Healthcare providers may utilize dietary history and blood tests to measure serum vitamin A levels. An ophthalmologist or healthcare provider may also assess for night blindness and other visual impairments related to deficiency.

Treatment Protocols: Treatment typically involves vitamin A supplementation, which can rapidly improve eye signs and prevent progression to blindness. Supplementation is often given in high doses under medical supervision, especially in children at risk. Nutritional counseling to promote a diet rich in vitamin A sources is also important. Addressing underlying causes, such as malabsorption, and improving overall nutritional status are key components of long-term management. Public health strategies like vitamin A supplementation programs are essential in regions with high prevalence.