Shortsightedness (or myopia) is an eye focusing disorder that is estimated to affect over 1.6 billion people worldwide. Myopic people see near objects clearly, but distant objects appear blurry. The number of people suffering from myopia is increasing rapidly as children are spending more time on computers, watching television, or reading books, and less time involved in outdoor play. Myopia treatment has therefore become common practice, with more and more children diagnosed with shortsightedness each year.
After focusing on close-up objects for extended periods, the focusing muscles in the eyes lock up. This results in the eyes becoming more and more elongated. Shortsightedness occurs when the eyes become overly elongated.
Orthokeratology is also a very effective technique for myopia control. Corneal reshaping contact lenses are worn at night to modify the shape of the cornea. Then, when the lenses are removed in the morning, the cornea that was reshaped while sleeping provides clear vision all day without the need of glasses or contact lenses.
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