Transition Lenses: Yay or Nay? BY DR. JOSEPH COHEN | WOODLAND HILLS EYE DOCTOR

For the less visually gifted among us, the sun can be a huge problem in conjunction with our existing glasses. You either have to pay for a second pair of glasses with tinted lenses and carry them around, or you have to have some sort of cover for your glasses. Whether it is an entirely separate pair or an add-on for your regular frames, the struggle is real. At some point, someone got tired of this and the photochromic (transition) lens came to be. This lens will darken under the rays of the sun and return to normal when you go back inside.

While the photochromic lens has been around for some time, the options for these have grown. Now there are materials other than glass and colors for lenses other than grey. The most common brand is “Transitions”, but they are not the only game in town these days. PhotoFusion, Thin & Dark, and Sensity have lenses on the market.

The method in which photochromic lenses darken has evolved as well. Old school models used silver halide or silver chloride to darken in reaction to UV light. These days, makers are using proprietary dyes and the reactions are chemical changes. The one thing that remains the same is that UV light is required to make them darker.

READ MORE: http://drjscohen.com/blog/transition-lenses-yay-or-nay/

Dr. Joseph Cohen O.D. 

Woodland Hills Optometrist

Get excellent service on a comprehensive eye care

(818) 345-3937

19737 Ventura Blvd., Suite 201, Woodland Hills, CA 91364