Sunglasses quality problem

by:Timeless Eyeglasses     2021-06-22
u003cbru003eIn addition to reducing the radiation intensity of visible light, sunglasses can also reduce ultraviolet and infrared radiation. Polarized sunglasses can also be used to eliminate horizontal reflections on water, snow, and gravel roads. Sunglasses are now more fashionable. But the fundamental role of sunglasses is to provide radiation protection for the eyes. The basic requirements for sunglasses are: eliminate unnecessary radiation bands that may damage the eyes; reduce the intensity of ambient light entering the eyes, provide clear and comfortable functional vision; maintain normal color vision, which is reflected in the rapid and accurate identification Traffic signal lights; maintain the amount of dark adaptation or night vision; good impact resistance and abrasion resistance. This article is about the quality of sunglasses. Sunglasses quality problems In addition to the above-mentioned main quality problems of sunglasses in the domestic market, such as: the average transmittance (ultraviolet spectrum region) exceeds the standard; the UV protection performance of the product label is 'not worthy of the name'; the light transmission performance is poor, etc., gradient gradient colors are currently popular in the market In sunglasses, the upper part of the lens is usually darker and the lower part is lighter. Gradient color sunglasses lenses are all made of dynamic dyeing. Because the consistency in production is more difficult to control, the difference in color and gradient between batches is greater than that of monochromatic lenses. If the sunglasses manufacturer ignores this aspect of control, it will be extremely difficult to control. It is easy to make the color and transmittance of the left and right eyes of the product inconsistent. In addition to affecting the appearance, it will increase the different adjustments of the left and right eyes. In severe cases, visual fatigue will occur. In the next section, we will introduce the detection indicators of sunglasses.
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