Evidence supporting the use of: Vitamin A (not specified)
For the health condition: Eyesight (poor)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 5

Vitamin A is scientifically validated for its role in supporting and treating poor eyesight, particularly in conditions related to vitamin A deficiency. Retinol, the active form of vitamin A, is essential for the formation of rhodopsin, a pigment in the retina that allows for vision in low-light conditions. Deficiency in vitamin A can lead to night blindness and, in severe cases, xerophthalmia, a progressive eye disease that can result in permanent blindness. Numerous clinical studies and public health interventions have demonstrated that vitamin A supplementation can prevent and treat these deficiency-related eye disorders, particularly in populations at risk, such as children in developing countries (WHO). However, it is important to note that vitamin A supplementation does not improve eyesight in individuals with normal vitamin A levels or treat non-deficiency-related vision issues such as myopia or age-related macular degeneration. The strong evidence base for vitamin A's role in preventing and reversing deficiency-related visual impairment is reflected in its inclusion in global health recommendations for at-risk populations.

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