What are the color photochromic?
/How to judge the quality of color photochromic?
/ Pay attention to the trivial matters when wearing glasses.
Photochromic lenses, also known as photosensitive lenses
It discolors and fades based on the reversible reaction principle of light and color interconversion. The lens changes color quickly through photochromic factors and catalysts under light and ultraviolet irradiation, preventing damage to the eyes such as strong light from returning to the dark, and can quickly recover to the original state. The discolored state ensures the light transmittance of the lens and adapts to dark environments.
Suitable for all-weather use.
So how to judge whether a pair of photochromic lenses is good or bad?
1.Light background color
(Due to technical and design reasons, the background color cannot be avoided.
The lighter the background color, the better the wearing effect in dark environment)
2. Fast discoloration and fading
3. The discoloration is uniform, no patches appear, and the color is deep 4, and the service life is longer.
(As time goes by, the background color of the color-changing film will become darker and darker. If the background color is too dark, it will affect the wearing effect in dark environments)
Things to note when choosing photochromic lenses
1. If the power difference between the two eyes is more than 100D, it is recommended to choose film-changing lenses, so that the different thicknesses of the two lenses will not lead to different shades of discoloration, affecting the appearance and visual effects.
2. If one of the photochromic lenses is damaged or needs to be replaced for other reasons, it is recommended to replace both at the same time, so that there will be no color difference due to different discoloration effects due to different batches and wearing times of the two lenses.
3. If you have high intraocular pressure or glaucoma, be sure not to wear photochromic lenses. If you wear them, the reduced light exposure and pupil dilation will aggravate the aqueous humor circulation disorder in the eye, further increasing the already high intraocular pressure and leading to the disease. worsen and even cause partial blindness.
4. It is not recommended for children and teenagers to wear photochromic lenses because the eyeballs of these people have not yet fully developed. Wearing photochromic lenses too early will affect the normal development of the eyeballs.
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Post time: May-24-2024