What is the best vitamin to improve eyesight?

Vitamin A supports normal vision, but a deficiency and an eye condition need different care.

Vitamin A deficiency can impair vision, especially in low light. The NIH vitamin A fact sheet explains deficiency and the risks of excessive supplements.

The National Eye Institute healthy-vision advice recommends a balanced diet with varied fruit and vegetables, including leafy greens. Seek an eye-care professional’s advice for changes in vision.