The lens in the eye changes shape to bring objects into focus. Myopia (nearsightedness) is the lens’ inability to bring objects that are far away into focus. The light gets brought into focus in front of the retina, so the eyeglasses needed to correct for this have diverging lenses.

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Hyperopia (farsightedness) is when the image is focused behind the retina, which happens to people later in life. The way to correct it is with a pair of converging lens eyeglasses.

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