How long do photochromic lenses last?
Photochromic lenses last as long as your prescription. Plastic photochromic lenses usually out last the lifetime of a patients prescription, about 2.5 years. Glass photochromic lenses never stop working; in fact glass Photochromics get better with age and will not slow down or loose the darkening ability.
Photochromic lenses last as long as your prescription. Plastic photochromic lenses usually out last the lifetime of a patients prescription, about 2.5 years. Glass photochromic lenses never stop working; in fact glass Photochromics get better with age and will not slow down or loose the darkening ability. Why don’t my new glass photochromic lenses work as well as my old pair? Glass photochromic lenses unlike plastic need to be worn and broken in unlike plastic photochromic lenses which have a life span of about 2.5 to 3 years. To speed up the break in period the lenses can be placed in the sun for the fist day or two allowing the sun and UV like activate the photochromic crystals and with use will get darker and change faster until they meet the manufacturers performance levels.
