Answer:
A) Farsightedness
Definitions
The eye is the organ of sight, in vertebrates typically one of a pair of spherical bodies contained in a orbit of the skull and in humans appearing externally as a dense, white, curved membrane, or sclera, surrounding a circular, colored portion, or iris, that is covered by a clear, curved membrane, or cornea, and in the center of which is an opening, or pupil, through which light passes to the retina.
Farsightedness is the condition of being unable to focus on near objects; presbyopia.
Nearsightedness is the property of being nearsighted, myopia.
Astigmatism is a refractive error of the eye in which parallel rays of light from an external source do not converge on a single focal point on the retina.
Cataracts are an abnormality of the eye, characterized by opacity of the lens.
A person whose eyeball is shorter than normal suffers from hyperopia, also known as farsightedness. In farsightedness, the light entering the eye is focused behind the retina instead of on the retina, leading to difficulty in seeing nearby objects clearly. This can be corrected with glasses or contact lenses that have convex lenses, which help to bend the light more and focus it on the retina.