Everyone knows, the word of eye myopia needs to wear glasses to correct in time, but some myopic person is in the eyesight after wearing glasses still present drop trend, what reason is this?Want clear this reason, should understand above all why can myopia?
Myopia, as it is now known, is caused by environmental and genetic factors.If one parent has a high degree of myopia (myopia of more than 600 degrees), the chance of having a child with myopia is much higher.In myopic heredity, be misunderstood easily a bit is, be not hereditary myopia, hereditary is myopic probability, contract myopia more easily namely.Environmental factors are easier to understand, using the eye environment causes visual fatigue.Visual fatigue is the main reason that causes myopia, the eye is in after myopia, besides meeting visual content is fuzzy outside, eye axis can appear qualitative change as the growth of degree, eye axis is spindled from this and irreversible.
Below ordinary circumstance, myopia is mature in eyeball after development (18 one full year of life is controlled) won't grow, but actual circumstance is, even if be middle aged person, the degree after using an eye excessively still presents the trend that grows, although very slow.Visible, environmental factor had crossed growth bottom line, whether myopia degree grows is not the influence that gets age only, excessive use an eye is the culprit that its grow.
After wearing a lens myopia degree still keeps growing a few cases, see if you are in the gun.
Bad eye habits
Myopia was originally mostly caused by bad habits with the eyes at ordinary times, many myopia patients in the glasses after the bad habits with the eyes or not corrected, such as daily do not pay attention to reading and writing distance, time and posture.For example, too close, time is too long, lying reading, light is too dark, and even unrestrained watching TV and playing games, these can lead to ciliary muscle spasm in the eye, for a long time, will cause vision loss, myopia degree increased.
There are developmental abnormalities in the eye itself
The occurrence of one part myopia is concerned with abnormal development of eye oneself, although this kind of patient matched glasses, myopia degree or can increase ceasingly.Even so, wearing the right glasses, and pay attention to eye hygiene, strengthen eye health care, or to a certain extent, can achieve the effect of slowing down the development of myopia.
Glasses are on and off
Some people wear glasses as a burden, afraid of hinder beautiful, also some people mistakenly wear glasses more wear degree more deep, so that the formation sometimes wear, sometimes do not wear habits.This will make the eye for a long time often in the unstable adjustment state, may cause myopia degree deepen, vision drop.
Reason of glasses quality
Whether the optical center and pupil distance of the lens have errors, and if it is myopic astigmatism, whether the dispersion luminosity and axis position are accurate, all these determine whether a pair of glasses is comfortable to wear and whether a good correction effect can be achieved.Glasses quality to improve vision, reduce or eliminate eye fatigue is crucial, a pair of unqualified glasses can also cause vision loss, myopia deepening.
