Medically termed nearsightedness or myopia is a common cause of blurred vision that can be mild, moderate, or severe. It is a type of refractive error of the eye. If you are nearsighted, you have trouble seeing things that are far away and out of focus. This occurs when the physical length of the eye is greater than the optical length which is difficult for the eyes to focus light directly on the retina. If the light rays are not clearly focused on the retina, the images you see may be blurry.
Nearsightedness can impinge on males and females in the same way. People who have a family history of nearsightedness are more likely to develop it. Most nearsightedness is caused by a natural change in the cornea or the lens of the eye.
This condition usually starts in childhood between ages 6 to 12. During the teen years, it may develop or get worse quickly as the eyeballs continue to grow. Teenagers who have this condition may need new glasses every 12 months or even more often. Nearsightedness usually stops getting worse by age 14 to 16 in women and by the mid-20s in men.
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