Nearsightedness, or myopia, is the most common refractive error. People who are nearsighted have difficulty seeing objects in the distance, and may find themselves squinting when trying to see distant objects clearly.
Causes of Nearsightedness
Nearsightedness is caused by a change in the shape of the eyeball, making the eyeball more oval than round. In some cases, nearsightedness may be the result of a change in the cornea or lens of the eye. The irregular shape of the eye causes light rays entering the eye to focus in front of the retina instead of directly on the retina.
Nearsightedness is most often an inherited eye condition, though in rare cases, it may be caused by another disease or eye condition. Myopia generally stabilizes in young adults.
Symptoms of Nearsightedness
The primary symptom of myopia is blurry vision when looking at objects in the distance. People who are nearsighted may have difficulty seeing images on a movie screen or television, or words on a blackboard. Nearsightedness can cause poor school, athletic, or work performance.
Treatment for Nearsightedness
Nearsightedness can usually corrected with eyeglasses or contact lenses. The condition may also be treated with LASIK, PRK or intraocular lens implants (IOLs).
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