What herbal medicine can i take to improve my vision?

None known: There are no known medications, herbal or otherwise, that improve vision. The eye needs several nutrients to function properly. You can get these by eating dark green leafy vegetables, yellow vegetables and eating fish.

None: Though we would love to see such an herb, none exists in true scientific literature. Beware non fda claims of health benefits of herbal concoctions. Ophthalmology is a real branch of medicine that will help your vision needs.