Most discount prescription glasses use resin lenses, this lens material is very delicate, the lens is easy to scratch, affecting refractive correction. The lens will oxidize yellow after long-term use, and the clarity and light transmittance will be reduced, which will cause visual fatigue, and may also aggravate myopia in serious cases.
Especially when the leg of one side of the glasses falls off or the nose holder is lost, but still insist on wearing, this situation will lead to the horizontal displacement of the frame, due to the inconsistency between the optical center and the peripheral degree of many functional lenses, coupled with the prism effect, easy to cause dizziness, headache, eye fatigue and blurred vision.
The correct use and preservation in daily wear can increase the service life of glasses. For example, take and wear the glasses correctly, that is, you should take and wear the glasses with both hands; Wear correctly, so that the optical center of the lens coincides with the pupil, never too high or too low; Correct folding, most glasses are gently folded from the left foot first; Wipe the mirror correctly, dry the lens with a special cloth for glasses, do not touch hard objects, do not wipe the lens with your fingers, wash the resin lens with water as far as possible, wipe the dust particles on the mirror first, and then wipe in one direction; Store them correctly. When the glasses are placed, the convex side of the glasses is facing up. Wrap them with glasses cloth as far as possible and put them in the glasses case to avoid damage.
In the case of fine protection, the general use of glasses for 1 to 2 years is no problem. Children and adolescents are in the growth and development stage, the degree changes quickly, it is recommended that every 3 months to six months need to go to a professional eye hospital for review. If the glasses don't fit, replace them promptly.
Doctors remind: online glasses have risks, expensive is not necessarily appropriate
Not only offline, there are also many merchants selling glasses online.
Reporters found that some brands online monthly sales of more than 10,000. Ms. Ge, a consumer, said that the price of buying glasses online is cheap, but there is no way to try the style, and the price of the famous online store is also very high, and it is better to go to the physical store to measure, and the after-sale of the physical store is good.
For online mirror, Sun Wei said not recommended.
"If your myopia is 200 degrees, do you think you can choose a 200 degree lens from the Internet and then choose a frame, you can match a suitable glasses?" Actually not." Sun Wei said that the online lens pupil distance, pupil height, and the degree of the lens are uncertain, for example, although the glasses are 200 degrees myopia, but if there is strabismus, these data have to be adjusted, not with a 200 degree lens can be solved.
