What is a good lens for sunglasses

summary

Let's talk about the lenses of sunglasses first. There are four kinds of sunglasses according to the depth, which are 15%, 34%, 50%, 70% and 15% respectively. They are the shallowest. They are suitable for indoor and outdoor wear, especially for people with eyes and degrees. They can avoid the trouble of taking them off and wearing them. 34% depth, suitable for general use under the sun. 50% sunglasses can be worn in the hot sun and by the sea. 70% of the sunglasses are for special use, and are generally used for welding and other engineering majors. What kind of sunglasses is good to tell you.

What is a good lens for sunglasses

First, observe whether there are scratches, impurities, bubbles and stripes on the lens, and check the outer packaging of sunglasses. Regular sunglasses should be marked with product name, color, diameter, quality level, manufacturer's name and trademark, and anti UVA, UVB and CE marks are indicated on the mirror or tag.

Second: when buying sunglasses, try to wear them to see if you have dizziness and headache. Now there are also some myopia Sunglasses marked with diopter on the market, but because the pupil distance and other indicators vary from person to person, so if there is no professional guidance, consumers had better not choose this kind of diopter sunglasses.

Third: hold the two corners of the sunglasses to the fluorescent lamp, and let the reflective strip of the mirror roll gently. If the shadow of the fluorescent lamp reflected by the mirror appears wavy and twisted, it proves that the lens is not smooth, and such a mirror will damage the eyesight.

matters needing attention

The lens should be flat and transparent. The material of the sun lens is glass and resin. The best sun lens should be polarizing lens. It is made of synthetic resin, which is as light and precise as contact lenses. It is made of seven thin sheets. The outer two layers are super hard wear-resistant layers; the second and sixth layers are anti shattering strengthening layers; the third and fifth layers are ultraviolet filter layers, and the middle layer is polarizing filter layer. Polarizing lenses are the most popular sunglasses because they can effectively filter out the reflected light and harmful ultraviolet rays, and have the functions of anti shattering and anti abrasion.