Metric system. Metric system, international decimal system of weights and measures, based on the metre for length and the kilogram for mass, that was adopted in France in 1795 and is now used officially in almost all countries.
However, if taken in large doses, vitamin D side effects may include: Thirst; Metallic taste in the mouth; Increased urination; Decreased appetite; Weight loss; Constipation; Vomiting; Diarrhea; Itchy skin; Loss of muscle tone; Irritability; Tiredness; Sore eyes; Pain in the bones and joints ...
The most likely culprit for Eye Health would be Vitamin A and Beta Carotene, which are greatly responsible for eye health AND are often contained in the same fatty foods that contain Vitamin D- so it would make sense that you MIGHT be deficient in Vitamin A and/or Beta Carotene.