What is photochromic lens?
A photochromic lens is a lens whose brightness changes in response to ultraviolet light, and automatically adjusts the brightness of the lens in all weather conditions, from snow, rain, cloudy skies to sunny skies.The higher the amount of UV rays, the darker the lens color, and the lower the amount of UV rays, the lighter the lens color.
SWANS photochromic technology is characterized by rapid color changes and responsiveness to even small amounts of ultraviolet light.
*1 The intensity of the lens color varies depending on the exposure to UV rays.Even in a bright place, the color change will be less if UV rays do not hit the lens.
*2 The color of the lens will not change when placed inside glass that blocks UV rays, such as indoors or in a car.
*3 It is difficult to color when the temperature is high, and it is easy to color when the temperature is low.
*4 Once the lens color becomes dark, it will take some time for it to return to a lighter color.
FAQs
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Do photochromic lenses have a lifespan?
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The dimming function gradually decreases and becomes difficult to change.Please check the dimming function before use.If the change is difficult to notice, please replace it.
･Store sunglasses in a dark place. (about 1 hour if possible)
･Then, leave it outside on a sunny day for about 5 minutes and check the tint status of the lens.
(It will be easier to see the change if you cover part of the lens with aluminum foil, etc., and compare the areas that are exposed to light and the areas that are not.)
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Please tell me how to store photochromic lenses.
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When storing, avoid high temperature and humidity, and store in a dark place such as in a case.
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Can I use a lens with reduced light control function?
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Even after the dimming function decreases, the UV cut function is maintained, so you can prevent the effects of UV rays.
However, dimming cannot reduce glare, so if you find it too bright, we recommend replacing it.
It is possible that deterioration over time has affected things other than the dimming function, so if you continue to use it, please replace it if there is any abnormality in the lens or frame.
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I find it difficult to change the color of the photochromic lenses during the summer.
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Photochromic lenses are colored by the amount of ultraviolet rays, but they tend to become brighter as the temperature rises.
Therefore, the color of the lenses will change depending on the amount of UV rays and the temperature where they are used.
From the above, even if the amount of UV rays is the same, the color of the lenses tends to become darker in the winter when the temperature is lower, and it tends to be lighter in the summer when the temperature is higher.
