Cry to relieving the pressure

Cry to relieving the pressure
Will it really influence eyesight to cry?

It doesn't cry for people blindly to cry!

After crying, often think eyes ache, eyesight seems to become bad; The eye doctor points out, this results from muscular fatigue of eyeball, having a rest for a moment will return to normal, it is impossible to influence eyesight, TV series often describe the protagonist cries for blind eyes, it is a baseless gossip even more.

Often there are the following plots in the TV story: Because the protagonist is excessively sad, wash one's face with the tears all day, eyesight is damaged, even cry for blind eyes, a lot of people put out one's own discussion about experience, show oneself but cry too much, the eyesight of zero of any will worsen as seven past zero, make many people leave a question open in the heart, will it really influence eyesight to cry?

May really think eyesight fuzzy after wailing, but this is muscular fatigue of eyeball, the ciliary muscle excessively shrinks, so long as take a quick nap, will resume quickly, it is unlikely to cause the permanent injury.

Moreover, shedding tears even has benefit health. It is at ordinary times it is be constant in eyeball secrete tear,not only last sterilization enzyme tear, can resist the outside bacterium, can lubricate the eyeball, if the secreting amount of this kind of foundation is insufficient, eyes can do astringent and uncomfortable, when eyes have foreign matters to invade, can reflect and secrete the tear naturally, in order to wash away foreign matter, cross-eye ball and speech, is the important protection. In addition, while crying, human sympathetic nerve, parasympathetic nerve are in the excitement state, therefore stimulate the tear to secrete, the eyeball muscles of sports are getting active that concede and have few opportunities at ordinary times, it is not the bad thing.

However, some people rub eyes with hands while crying, may decrease and health. The cornea lying in the surface of eyeball is quite fragile, if exert oneself too while rubing eyes, may cause the broken cover of cornea, initiate infecting, if has not dealt with in time, may present corneal ulcer, the patient will feel the sharp pain of eye, tears flow not only, eyesight will exert a tremendous influence at this moment, the serious one even has a blind supposition, will not see light again unless transplant a cornea; The broken cover of cornea causes blind reason, it is only the following symptom that the tears flow without end, it is blind that not to cry to cause.