Individuals experiencing both myopia and hypermetropia often require bi-focal lenses, which consist of both concave and convex lenses. The upper part facilitates distant vision, while the lower part assists near vision.

Presbyopia arises due to the gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens.

Presbyopia is a defect where the near point gradually recedes as the power of accommodation decreases with age. People find it difficult to see nearby objects comfortably and distinctly without corrective eye-glasses.

Hypermetropia can be corrected by using a convex lens of appropriate power. Eye-glasses with converging lenses provide the additional focusing power required to form the image on the retina.

Hypermetropia can arise either because (i) the focal length of the eye lens is too long or (ii) the eyeball has become too small.