Nearsightedness

Nearsightedness, also known as myopia, is a common type of refractive error where close objects appear clearly, but distant objects appear blurry. It occurs when the eyeball is too long or the cornea (the clear front cover of the eye) is too curved. As a result, the light entering the eye isn't focused correctly, and distant objects look blurred.

Causes

Nearsightedness is often inherited and usually discovered in childhood. A basic eye exam can confirm nearsightedness. The condition can worsen as the eye grows and changes shape, until about the age of 20.

Symptoms

The primary symptom of nearsightedness is blurred distance vision. Other symptoms may include headaches, eyestrain, squinting, or fatigue when driving or playing sports.

Diagnosis

Nearsightedness is diagnosed by a basic eye examination. A complete eye exam involves a series of tests to check your eye health and a refraction test to determine your prescription.

Treatment

Nearsightedness can be corrected with glasses, contact lenses, or refractive surgery. Depending on the degree of your myopia, you may need to wear your glasses or contact lenses all the time or only when you need very clear distance vision.

Prevention

While it may not be possible to prevent nearsightedness, there are some practices that could potentially slow the progression. These include spending time outdoors and limiting close work.

See also

• Farsightedness
• Astigmatism
• Presbyopia

References

Nearsightedness Resources
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