Nearsightedness, also known as myopia, is a common vision condition in which near objects appear clear, but objects farther away look blurry. It occurs when the shape of the eye, or the shape of certain parts of the eye, causes light rays to bend inaccurately. Light rays that should be focused on nerve tissues at the back of the eye (retina) are focused in front of the retina, making distant objects appear blurry. Nearsightedness usually develops during childhood and adolescence, and it usually becomes more stable between the ages of 20 and 40.

Symptoms of nearsightedness include trouble seeing things that are far away, needing to squint to see clearly, and eye strain. Some people who are nearsighted may also get headaches, but this isnt as common. Nearsightedness can be diagnosed with a basic eye exam.

Prolonged reading or other close-up activities are associated with an increased risk of nearsightedness. Studies have shown that children who use computers or smart devices for long periods have a greater risk of developing nearsightedness. Some studies also support the idea that a lack of time spent outdoors may increase the risk of nearsightedness.

The most common treatments for nearsightedness are eyeglasses or contact lenses. Refractive surgery is also an option for adults. Contact lenses that slow nearsightedness are available for children between...