Vitamin D deficiency is very common in the world, according to PubMed.gov. Meanwhile, there is a link between vitamin D deficiency and dry eye syndrome. It was found that serum vitamin D levels in patients with dry eye syndrome were significantly lower than normal.
Thus, scientists have been able to obtain evidence that nutrition and dietary intake of vitamin D affects human eye health. This vitamin prevents age-related diseases and ensures cellular communication in the substance of the eye. Moreover, vitamin D reduces inflammation of the ocular surface.
Low vitamin D levels lead to a decrease in tear fluid production, which can lead to a burning, tingling sensation, and the eyes themselves become red and sensitive to light. All this is dry eye syndrome. “Dry eye syndrome is a common condition that occurs when the eyes don’t produce enough tears or they evaporate too quickly,” the researchers say.