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Nearsightedness (Myopia)

For a nearsighted person, close objects are clear, but distant objects are blurred and difficult to distinguish.

Farsightedness (Hyperopia)

Technically known as hyperopia, people who are farsighted have difficulty seeing close objects; distant objects may be clear but up close objects appear blurry.

Astigmatism

For people with astigmatism, all objects both near and far are distorted.

Presbyopia

Presbyopia is a natural occurrence in which the eye can no longer focus near objects. It commonly develops in people around the age of 40.