Exercising your body makes it stronger. So can exercising your eyes make your vision stronger, too? Unfortunately, there is no evidence that eye exercises improve vision. Your need for glasses is based on the shape of your eye, the size of your pupil, and the ability to shift focus, which declines as we age.
Still, like many alternative remedies, natural vision correction has supporters among some practitioners of holistic medicine and their patients. If you are looking into natural vision correction, here's some background to help you understand the issue.