transitions not getting dark
I have a problem that I hope you can help.
One of my patients recently purchased Transitions Flat top 28 plastic lenses, and she came back complaining that the lenses do not turn dark. I tested the lenses myself and the lenses will only turn to about 30% darkness even after few hours of exposure to the sun. I informed the lab of the problem and re-ordered the lenses; however the new lenses have the same problem. The patient is angry and I am not sure what to do. She had Transitions before and she knows and expects that the lenses should get much darker.
Could anyone tell me why Transitions lenses would not turn dark?
Would it be advisable to change the lenses to Sunsensors?
No Break in for non mineral photochromics
EyeFitWell,
Transitions and all other non glass/mineral photochromic lenses activate on their first exposure to UV light. There is no magic bullet. The performance on the first activation is as good as the UV index of the hour and day or the strength of the UV wavelength of a UV bulb if it is done in doors.
If the lens is cold or colder than a lens at ambient temps, it will get darker, for that one performance cycle, that's it. It wont be jmped to a new dimension of performance.
I visit many labs every year, I have yet to have a lab tell me they put Transitions in a freezer/refrigerator.
best regards,
Jim