Things to consider before getting transition lenses
- Your pupils dilate/enlarge to try to take in more "light" when transition lenses turn dark, same concept as you entering a dark room. This will potentially increase the amount of UV rays entering your eyes into the crystalline lens and the retina.
Why is that so?
- "All transition lenses have 100% UV protection" - This is very true but note that most normal spectacles do not cover your eyes all round. Hence, UV ray can enter from the uncovered gaps, such as from the top and sides of your spectacles. With dilated pupils, you are inviting more damage as compared to clear lenses with UV protection.
My views: Get a good sports sunglasses w/ inner lens prescription if you are going to be outdoor very often. Sports sunglasses usually protects your eye all round due to their curved nature to fit the face. Otherwise, just stick to clear lenses with UV protection to minimize the damage.
Speaking in the perspective of health-conscious consumer.
On the bright side, transition lenses look cool and reduces glare
The above said are all my opinions; take it with a pinch of salt. Hopefully, research can be done to prove/dispute this.