If you're looking to improve your eyesight without relying on glasses or contact lenses, yoga trainer Nidhi S recommends a series of simple exercises. These include eye circles in various directions, eye pushups to address convergence insufficiency, and fast and tight blinking to hydrate the eyes. Additionally, Tratak kriya, a form of light gazing, is suggested to purify the eyes and strengthen eye muscles. Nidhi advises performing these exercises consistently for at least a couple of months to notice significant improvements in vision.