A short eyeball or weak lens results in what refractive error?

The correct answer is hyperopia, which occurs when the eyeball is shorter than normal or when the lens has insufficient curvature to focus light properly. In this situation, light rays entering the eye focus at a point behind the retina rather than directly on the retina itself. This can lead to difficulty seeing objects that are close, while distance vision may remain clear.

Understanding why hyperopia results from a short eyeball or weak lens can help clarify how eye anatomy influences vision. The eyeball's length and the lens's refractive power are crucial for proper focus on the retina. In normal vision, these components work together to ensure that light is accurately focused. When the eyeball is shorter or the lens is weaker, it disrupts this focus and creates hyperopia, leading to blurry close-up vision.

Cataracts, astigmatism, and myopia refer to other types of refractive errors or conditions affecting vision. Cataracts are related to the clouding of the lens, while astigmatism is caused by an irregular curvature of the cornea or lens, leading to distorted vision. Myopia, on the other hand, occurs when the eye is longer than normal or when the lens is too curved, causing light to focus in front