Is there any way to naturally make your eyesight better?

I think I'm becoming nearsighted. I dont want to get gles or contacts. I dont want to talk to a doctor or anything yet. I want to know if there's a way to help my vision before it gets worse/ make it back to normal. It isnt that bad yet. But things that are more than about 70 ft away seem a little blurry. They say that carrots are good for your eyes. But can they actually help reverse astigmatism? And if so, how long does it take?