Myopia (Myopia) is not clear eyes, but see near the symptoms. On the premise that develops still distant objects in the retina can converge, while in the retina, thus caused by deformation of visual focus, resulting in distant objects blurred. Myopia points and two kind of refraction. Among the most severe myopia develops. Refractive myopia can reach 600 degrees above, namely high myopia.
Most near-sighted ineyeglasses youth, in the growth stage, to deepen degree year after the mature development or not. Its myopic degree is rarely exceed 6D, don't happen degenerative change, eyesight can glasses, called pure sex myopia.

Another kind of myopia occurs earlier (in 5 ~ 10 years old can occur between progress, and soon after 25 years old, myopic degree is to develop 15D can reach above, often accompany fundus changes, eyesight not correct, called degeneration myopia. In addition, the habit of always called slightly below the 3D nearsighted myopia, 3 ~ 6D considered moderate 6D myopia, or called high myopia.

 Pays attention to the fast improvement nearsightedness's method - - to transfer eyeball
 
 according to clockwise to transfer the eyeball first, the rotational speed must be extremely slow, left, on, right, in an instant main point lies to face forward straight throughout motionless, only moves the eye, does not initiate. When left face, the vision must toward left, be able to look that vigorously looks far far, but cannot the left face. When upward extension must look upwardly vigorously, but cannot raise.
 
 is also downward toward right and so, as far as the eye can see regards. The rotation track should be a circular, but do not only be left, on, right, the next four spots. Clockwise movement 25 from now on, again counterclockwise rotation 25 times. By now will feel the scruff to turn sour, the key glassesin this, must change to the scruff to turn sour, only then had the curative effect. Proof this time, ocular region's muscle nerve already with scruff's muscle nervous switching. Pays attention to the fast improvement nearsightedness's method - - to transfer eyeball
 
 according to clockwise to transfer the eyeball first, the rotational speed must be extremely slow, left, on, right, in an instant main point lies to face forward straight throughout motionless, only moves the eye, does not initiate. When left face, the vision must toward left, be able to look that vigorously looks far far, but cannot the left face. When upward extension must look upwardly vigorously, but cannot raise.

http://degree.iloveblog.com/2010/05/07/orthokeratology-lens-control-of-myopia-development/
http://www.eduforge.org/node/523
http://www.fropper.com/posts/53847

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