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Myopia, or nearsightedness, as it is medically termed, is a vision condition in which close objects are seen clearly, but objects farther away appear blurred. Myopia occurs if the eyeball is too long or the cornea, the clear front cover of the eye, has too much curvature. As a result, the light entering the eye isn't focused correctly and distant objects look blurred (Figure 1, from the Wikimedia Commons). Myopia is a very common vision condition affecting nearly 30 percent of population in the USA. Some research supports the theory that myopia is hereditary. There is also growing evidence that it is influenced by the visual stress of too much close work. Generally, myopia first occurs in school-age children. Because the eye continues to grow during childhood, it typically progresses until about the age of 20. However, myopia may also develop in adults due to visual stress or health conditions such as diabetes[1]-[4].
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