Transition lenses are photochromic lenses. When these lenses come in contact with UV light (found in sunlight), the lenses transition into a dark tinted lens. The photochromic molecules of the lens are activated by UV light which changes their structure, ultimately causing the lens to darken.
What are the benefits of Transition lenses?
One versatile pair of glasses – rather than switching back and forth between your eyeglasses and sunglasses throughout the day, you have one convenient pair
Eye protection everywhere you go – Transition lenses offer protection from harmful blue light and block 100% of UV light
Reduced glare and eye fatigue – because Transition lenses darken based on the amount of light you’re being exposed to, these lenses minimize glare and help maintain the proper amount of light entering your eye
Perfect for varying light levels – Transition lenses respond to the amount of light in your environment, that means there’s an appropriate lens shade for every lighting
Great for kids – kids typically are exposed to approximately 3x the amount of sunlight than adults, making them more prone to the hazardous effects of UV exposure. Transitions help ensure full time eye protection and promote healthy ocular development
Different types unique to your needs – there are several different lines of Transition lenses, one is made more sensitive for when driving your car, others designed to enhance your vision during outdoor activities like golf, running, biking and hunting
Transition lenses offer any wearer a great number of benefits. However, there are two points to be noted.
First is the sensitivity of Transition lenses in the car. The photochromic lenses are activated by UV light, and most car windshields have UV blocking properties. Due to the filtering out of UV light, the lenses become less sensitive to the given light level when driving. But fear not! Transitions offers an XTRACTIVE lens specifically for this reason.
Second is the influence of temperature on the sensitivity of Transition lenses. Since the color transition of the lens depends on the changing of molecular structures, Transitions are faster to adapt to light in warm environments and slower to adapt in cool environments. Cold air slows down the motion of the photochromic molecules, which in turn slows the process of changing their structure to initiate a color change.
In our experience, Williams Eye Works has found very positive patient response to Transition lenses. We don’t recommend Transitions as a replacement for your sunglasses, however they are a great asset for eye protection, convenience, and increased visual comfort.


If you would like to know more about Transition lenses, visit or contact us at Williams Eye Works.