Supplements come in three forms: Liquids, tablets, and capsules. You would be pleased to know that wine too, can protect your vision, and give you better eyesight without glasses. Experts think this is because they drink a lot of red wine. So by simply correcting your diet, consume more green vegetables and supplement it with the herbs I listed above, some people who have just experience blurry vision may correct them.
Actually, even if you do eat provisine one or more of those foods every day, supplementation is still a good option. When the range of motion of our eye muscles shrinks, our vision can stiffen gradually and the eye's ability to see will decrease. Some improvements can be seen in a few days or some can be in a few weeks. This is the reason why carrots are good for your eyesight... although I have to point out that few people suffer from poor eyesight due to a lack of vitamin A (meat contain vitamin A and vegetables contain beta carotene).