Question

what is presbyopia ? What are the causes of nearsightedness​

Answer 1

Answer:

This causes light rays to focus at a point in front of the retina, rather than directly on its surface. Nearsightedness can also be caused by the cornea and/or lens being too curved for the length of the eyeball. In some cases, myopia occurs due to a combination of these factors.

Explanation:

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Answer 2

Answer:

Near-sightedness, also known as short-sightedness and myopia, is an eye disorder where light focuses in front of, instead of on, the retina. This causes distant objects to be blurry while close objects appear normal.

Short-sightedness usually occurs when the eyes grow slightly too long. This means that light doesn't focus on the light-sensitive tissue (retina) at the back of the eye properly. Instead, the light rays focus just in front of the retina, resulting in distant objects appearing blurred.

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