Nearsightedness, Myopia, Symptoms and Causes
Nearsightedness (Myopia) Definition:
Commonly known as nearsightedness, myopia is a condition in which the image of a distant object becomes focused in front of the retina. This condition makes distant objects appear out of focus and may cause headaches and/or eye strain.
Nearsightedness (Myopia) Symptoms:
The most common of nearsightedness symptoms is blurry vision. Young children might not realize they have the condition. You may suspect nearsightedness in children if they do the following:
- Hold books or objects very close to the face
- Squint or frown
- Sit close to the TV or computer
- Have frequent headaches
Nearsightedness (Myopia) Causes:
Nearsightedness occurs either because the eyeball is too long of the cornea has too much curvature. As a result, the light that enters the eye is not focused correctly, causing a refractive error. Light rays of images focus in front of the retina, rather than directly on the retina and cause blurred vision. The exact cause of nearsightedness is unknown. Factors that may be primarily responsible for its development include heredity and visual stress. Nearsightedness usually runs in families and appears in children. There is an increased chance that the children of one or both nearsighted parents will also be nearsighted. In addition, a person who spends a lot of time doing close visual work, such as reading or using a computer, will be more likely to develop nearsightedness. Sometimes the condition plateaus or worsens with age.