There are three processes for resin-changing lenses.
The incorporation method, known as bulk polymerization, is similar to the method of glass lens, that is, one or more photochromic dyes are directly incorporated into the polymer monomer of the substrate for bulk polymerization, and the lens formed after curing will change color. Discoloration dye is completely integrated into the resin lens substrate, so the lens made of color persistence is very good.
The uniformity of discoloration and the depth of color after discoloration are highly related to the thickness of the lens. Because the thickness of the lenses at all levels is different, there will be a color difference between the depth of discoloration and the uniformity, and the uneven phenomenon of high brightness is more obvious.
The film type is known as the coating method. It is the chromatic resin lens by coating or dipping in a layer of chromatic dye on the base of the resin lens. Because the coating covers the surface of the lens, the color uniformity is good. The coating, which is only about 0.05mm thick, does not provide enough molecules to make the lens dark enough, so the color is relatively less dark, and the discoloration lasts slightly longer.
Infiltration, known as the penetration method, is to use the principle of penetration, through the thermal diffusion method to make the color dye permeate the surface of the resin lens sheet material, with diffusion depth up to 0.15~0.20mm. The lens has a constant color change characteristic. There will be no inconsistency between the center and the surrounding color as the luminosity gets darker. The color-changing resin lens made by infiltration type has the benefits of uniform color-changing, small color difference, fast and thorough color-fading, which is the mainstream of color-changing technology at present.
The taboos of wearing glasses while driving at night
Night driving members should not wear tawny, green, and gray glasses. Tawny glasses can filter out most of the ultraviolet rays, although can make our eyes feel relaxed but easy to make people sleepy. Green glasses will turn red lights into black, directly affecting our judgment of traffic lights, so there is a great safety risk. Grey glasses, due to their low light transmittance, will weaken our line of sight and affect our observation of the road.
Who should wear low bridge glasses?
According to the website of the American Optical Association, low-bridge glasses are for people with a low bridge of the nose (when your nose is at or below the pupil level), a wide face, or high cheekbones. This pair of glasses fit anyone with a low nose. If you have a tall bridge, it's great to have a bridge near the eyebrow line. If you have a low bridge of the nose, a more curved brow or a lower bridge of the nose frame is a better choice. Because the dimensions of the bridge are measured from the inside of the frame, a thick-sided frame with the same bridge dimensions and a very thin frame will not fit. It may actually be too small. Because it allows for extra edges.
Vintage full-frame frames
The glasses with a full black frame give a person a more intellectual, literary feeling. As fashion accessories, they are very good. The frame is light, so you can wear it without any burden, and the price is super affordable. Black and metallic collision, let eyeglass frame have more individual glamour. It's light and comfortable to carry.
Semi-rimless glasse with lightweight structure
Semi-rimless glasses are not heavy and thus very comfortable to wear even over a long period of time. The frame is used with less material and can reduce the weight of the glasses themselves so that the glasses are lighter. And they can reduce the pressure on our bridge of the nose, for our bridge of the nose, they can reduce a lot of burdens. Because they weigh less, they have a smooth and foldable style.
How to Choose Glasses for Square Face?
Cat-eye glasses: cat-eye glasses are currently a very popular fashion trend. The upswept browlines provide curves and movement that are suited for any face shape. So, if you have a square face, you can try cat-eye glasses.
Oval glasses: oval glasses can soften your strong angles and balance your face and minimize your strong features. So, if you have a square face, you can try the oval glasses.
How to choose the best glasses for square faces? After reading this post, you may have some ideas. If you want to choose sunglasses for square faces, you can also follow the above suggestions. If you want to choose a new pair of glasses or sunglasses, Koalaeye glasses are recommended, which are stylish and at a cheap price.
Who needs computer glasses?
Blue light radiation from computer screens and so on usually only requires a piece of fiberglass to block, usually, we just use the anti-radiation glasses. Office white-collar workers often spend more than 8 hours a day working in front of a computer, and sometimes they spend their entertainment with a computer after going home. After long, the eye often can feel dry, sour bilge, ache, shed tears even, giddy. These are all related to the blue light stimulus emitted by the screen.
