Vision correctors are devices used to improve vision, such as eyeglasses or contact LENSES. The term 'vision correctors' can refer to either eyeglasses or contact LENSES, both of which are made of LENSES. Eyeglasses are frames with LENSES that fit over the eyes, while contact LENSES are thin, curved pieces of plastic that fit directly on the eye. Both types of vision correctors help people with vision problems see more clearly.