Intrinsic quality of the photochromic lens itself, service life
Date:2023.04.22 Views:401
The intrinsic quality of the photochromic lens itself includes the service life of the lens, anti-glare, hardness of the lens, light reflection function, etc. The service life is one of the important properties of photochromic lenses.
The service life of photochromic lenses consists of two parts: one is the service life of the lens material itself, which is required to be the same as the ordinary lens; the other part of the service life is determined by the life of the chromogenic agent in the lens, the length of the chromogenic lens life determines the length of the photochromic lens discoloration time, and the effectiveness of the chromogenic agent is generally required to be greater than the life of the lens itself. The effectiveness of the chameleon is the reversible performance of the chameleon to change and fade repeatedly under UV light, if the chameleon does not change color, we say that the chameleon fails and the life of the chameleon lens ends. Generally speaking, the life span of technically mature chameleonic lenses is longer, and some poor quality photochromic lenses have cracked and deformed lens materials after a period of time, which indicates that the quality of the lenses is not good.
The speed of photochromic lenses has a certain relationship with the hardness, generally speaking, the high hardness of the lenses, the slow speed of discoloration; the low hardness of the lenses, the fast speed of discoloration. The speed of photochromic lenses should be one of the main signs of quality photochromic lenses, however, if the material of the lenses is too soft, it will affect the service life of the lenses, because too soft lenses are often not fully polymerized, and after a long time, they are prone to deformation.
