Is farsighted glasses concave lens or convex lens

Parallel light rays entering the eye are refracted by the eye's refractive system. If the focal point is behind the retina, the refractive state is called farsightedness. Farsightedness glasses move the focal point behind the retina forward so that it falls exactly on the retina, thus improving vision. Focus forward is convergence enhancement, junior high school physics shows that convex lens can focus convergence, forward, so farsightedness glasses is to configure convex lens on the patient's frame, so that the original focus behind the retina refractive power strengthened, focus forward, so that the patient's vision becomes clear.