Nearsightedness is most often caused by a natural change in the shape of the eyeball that makes the eyeball too long, so that it is egg-shaped instead of round. This causes light entering the eye to focus in front of the retina instead of directly on the retina, causing blurry vision.
In a person with nearsightedness (myopia), close objects can be seen more clearly than objects that are farther away. Nearsighted people may squint or frown to see things at a distance. They often hold books or other objects close to the face, sit at the front of a classroom or movie theater, and sit close to the television or computer.
|Primary Medical Reviewer||Kathleen Romito, MD - Family Medicine|
|Specialist Medical Reviewer||Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology|
|Last Revised||June 24, 2011|
WebMD Medical Reference from Healthwise