MERRY PLEASURE Photochromic Blue Light Computer Glasses for Men and Fashion Crown Boston Round Light Color Lenses Sunglasses, Blocking, Women,

UV Protection Fashion glasses Unisex Blocks 99.9% of UV rays With dimming function 【size】 Total length: approx. 136mm Lens width: approx. 45mm Bridge: approx. 13mm Vertical width: Approx. 46mm Lens vertical width: Approx. 40mm Temple: Approx. 140mm [Weight] 25g 【material】 Front: Plastic Bridge: Plastic Temples: Plastic Lens: Plastic [UV Protection Rate] 99.9% [Visible light transmittance] CLEAR→SMOKE: 18% CLEAR→BROWN: 19% Lt.SMOKE.HALF→SMOKE:12% Lt.BLUE.HALF→BLUE:37% *This is the transmittance of the dark color after the color change. Introducing blue light blocking sunglasses with photochromic function. Crown panto style design. This is an old design that was very popular in France in the 1950s. The rounded design is combined with straight lines, giving it a classic yet modern feel. The Asian fit model has adjusted the nose thickness and height to suit Japanese faces, making it easy to fit and comfortable to wear. What are photochromic lenses? These lenses change density depending on the amount of UV rays. The lenses change color depending on the light indoors and become sunglasses outdoors. The color will not change when there is no UV light or only a small amount of UV light, such as indoors, on cloudy days, in winter, or in the morning. ●What is blue light? Blue light emitted from LCD screens such as computers and smartphones is one of the causes of eye fatigue. It has a short wavelength and is the light with the highest energy among visible light rays, which can cause eye fatigue and mental fatigue. Additionally, sunlight also contains light of similar wavelengths, so it is believed that exposure to sunlight for long periods of time at night or before going to bed can disrupt the rhythm of our biological clocks and cause sleep disorders.