It is important to understand that temperature does have an effect on the lenses, but simply freezing them does not change them permanently. When they are colder they fade back slower, and when they are warmer they fade back faster.
When you expose your eyeglasses to extreme temperatures, the lenses can expand and contract. This slight variance on your lenses can cause the coating to crack. If you leave your prescription glasses in your car in hot or cold weather, you can also damage the frames.
When freezer space is limited, glassware can get a decent chill in the refrigerator. Place glasses in the coldest place of your fridge—typically at the back on the top shelf, near the cooling unit—for at least an hour or up to four hours.
Photochromic lenses take longer to turn from dark to clear than from clear to dark. If you receive photochromic lenses that don't seem to be working, put them in the freezer for 10 to 15 minutes and then take it outside in direct sunlight. This should activate them and should make it work.
“How do you activate transition lenses?” They activate automatically in the presence of UV rays. If they are new, take them out in sunlight for 4 minutes , then put in dark place 4 minutes repeat several times and they will change faster.
Temperature affects how Transitions change. When they're hot (like in the summer), the lenses will change slower and won't get as dark. When Transition lenses do wear out, they will take on a yellowish tinge when they're clear. They will no longer get as dark at that point.
0:131:12How to Polish Plastic Eyeglass Frames - YouTubeYouTubeStart of suggested clipEnd of suggested clipOr a microfiber cloth you want to put you some oil or furniture polish. And just gently rub yourMoreOr a microfiber cloth you want to put you some oil or furniture polish. And just gently rub your glasses. Let it sit on there for a few minutes and then turn your cloth over where it's dry.