The color and function of sunglasses
Did you know that different colors of sunglasses have different functions and effects, and you can choose sunglasses according to your needs. It is necessary to understand this knowledge, so that you can not only choose the style and color you like, but also make the sunglasses play the best role. Good sunglasses, no matter what color and style they are, must have the following basic conditions:
1. It has a very good anti-ultraviolet function and should be able to completely absorb ultraviolet rays below 340nm.
2. The transmittance of visible light is between 20% and 40%. If the transmittance is too low, it will affect your sight and even bring safety hazards.
3 After wearing sunglasses, it should not affect your color recognition. Especially for color blind patients, it is not suitable to wear sunglasses.
Several commonly used sunglasses lens colors are gray, brown, green, light pink and yellow. Now briefly introduce as follows.
1. Neutral gray sun lenses. Generally, metal oxides are mostly gray. The number makes the lens also gray. Because it does not change the color of the original gaze. There will be no obvious color difference, so it is called neutral color. Good sun lenses will add UV powder inside, which can absorb 98% of ultraviolet rays and most of infrared rays, reduce the transmission of visible light (dark gray only passes 12%), and does not affect the recognition of colors. Especially suitable for those with color vision impairment. It feels cool to wear in summer.
2. Brown sun lenses. After adding UV powder, it can absorb 99% of ultraviolet rays and most of infrared rays. It absorbs more visible blue light and reduces the transmission of green light. Makes blue skies appear darker. Enhance contrast. Increased difficulty in color recognition. Poor color differentiation. Wearing it in autumn and winter will make the face appear red due to the scattering of light. Commonly used in color filters without changing the natural scenery.
3. Green blue sunglasses. After adding UV powder, it can absorb 99% of ultraviolet rays and most of infrared rays. Contrast can be enhanced in air pollution, or foggy conditions. Easy to eliminate eye fatigue. The resolution of colors is slightly poorer.
4 light red sunglasses. After adding UV powder, it can absorb 95% of ultraviolet rays and part of shorter visible light, so that the overall light intensity is weakened, making it comfortable to wear.
5. Yellow sunglasses. After adding UV powder, it can absorb 100% of ultraviolet rays and transmit 83% of infrared rays. It has a filtering effect on yellow. Good for viewing landscapes and enhancing contrast. In addition, yellow lenses appear to make the field of vision clearer, and are often called night vision lenses.
There are many colors of sunglasses lenses, and the above are the same colors commonly used, so I won’t say much about the others. When we buy sunglasses, we must comprehensively consider
In order to buy sunglasses that suit you, you must consider many aspects of glasses.
