Wearing glasses on this thing, the concept in mind of a lot of people is, as long as myopic degree is changeless, glasses is done not have bad need not change, match a pair of glasses to be able to be worn for ages. Next, small make up tell respectively for everybody tell inferior glasses and expire the concept of glasses, everybody should note the undesirable effect of these glasses.
Inferior glasses
One, what is inferior glasses?Inferior glasses is the glasses of off quality. Total bureau of national qualitative check ever undertook selectiving examination discovering to the glasses product of 10 provinces city, nearly 3 into product off quality. According to calculating, our country's annual glasses requirement is as high as many pairs 100 million, that is to say, every year nearly 30 million person deserves to wear unqualified glasses.
The harm of inferior glasses:
Endanger 1, lens is inferior
The material matrix of inferior lens is impure, lens floats easily yellow. Fight concussion ability is poor, brittle, light transmittance low, luminosity distributings inhomogenous, adorn long can cause inspect content to be out of shape, ambiguous, affect a vision.
Endanger 2, lens wearing is inferior
Inferior speculum wears smelt craft to differ, purity low, impurity is much, break solder, fade easily not only, oppress to bridge of the nose at the same time strong, adorn easy is measurable and inferior. Additionally inferior lens wears big to skin stimulation still, simple soft, changeful look, send allergy easily.
Harm 3, glasses is assembled unqualified
Glasses assembles unqualified meeting to affect double eye to coordinate the ability that looks matter, can bring about deflection of center of the optics when adorning, long can make eye flesh overbalance, cause the symptom such as bosseyed, amblyopia, cause the rapid change of diopter possibly still, accelerate myopic growth.
Expire glasses
2, what is to expire glasses?Inside glasses industry expire the glasses that deserves to wear, say for " poisonous " glasses. Expire glasses is to exceed period use glasses, namely lens has the expiration period with lens wearing. According to investigation, the person of above of the half in myopic crowd is 3 years or change more for long glasses.
Expire the harm of glasses:
Harm 1, lens wears away
Match Dai Huiyan for a long time to wear away again lens, do not change can cause look matter badly not clear.
Harm 2, lens wearing is out of shape
Glasses Dai Jiu, lens wearing meets those who produce different rate to be out of shape, become loose. Make the optical center of glasses cannot aim pupil center, cannot effective and correctional eyesight, accordingly, cause concealed strabismus easily, inspect the symptom such as exhaustion.
Harm 3, glasses owes correct for a long time to bring about eye degree to increase fast
Eye myopia did not undertake inside short time correct correctional, can make myopic degree increases quickly.
Small finally make up remind each myopic friends, match lens to want active, must change inside the expiration period new glasses, ensure the health of the eye, and again good glasses also is not commodity, however a kind of method of correctional eyesight.
