The color-changing lens is based on the principle of the reversible reaction between light and color. The lens can be quickly darkened under light and ultraviolet radiation, blocking strong light and absorbing ultraviolet light, and has a neutral absorption of visible light; returning to the dark place, it can quickly restore the colorless and transparent state , To ensure the transmittance of the lens. Therefore, the color-changing lens is suitable for indoor and outdoor use at the same time to prevent the sun, ultraviolet light, and glare from harming the eyes. According to the principle of reversible light and color interaction, the lens can quickly darken under the irradiation of light and ultraviolet rays, block strong light and absorb ultraviolet rays, and have a neutral absorption to visible light; back to the dark place, it can quickly return to a colorless and transparent state, ensuring the lens Light transmittance. Therefore, the color-changing lens is suitable for indoor and outdoor use at the same time to prevent the sun, ultraviolet light, and glare from harming the eyes. So what should I pay attention to when wearing myopia? Let's follow the editor of single vision photochromic lens to have a simple understanding!
1. The degree of myopia should be within 400 degrees. Because the greater the myopia power, the thicker the edge of the lens, the middle color looks lighter, and the surrounding color is darker. This kind of glasses is not beautiful, and because the middle is too thin, the shading effect is not obvious. In addition, the difference between the degrees of the two eyes should not exceed 50 degrees, otherwise the left and right sides of the lens are of different shades and are not beautiful.
2. To check the speed of discoloration, it is generally required that the color change completely within 40 seconds after exposure to strong light. After leaving the sun, the color will fade to the degree of translucency within two minutes. After the color is completely faded, the surface of the lens is colorless and transparent, leaving no color.
3. See if the color change is uniform. Check the discoloration under the sun, and pay special attention to whether the light-sensitive discoloration of the lens is the same, so as to avoid the appearance of a dark and light color.
The above is the single vision photochromic lens editor introducing the points that need to be paid attention to when wearing myopia. You can learn more about it.