When it comes to prescription photochromic sunglasses, I highly recommend the Oakley Brown Transitions Gen 8 lenses. The brown tint enhances contrast, making them ideal for activities like mountain biking in the woods where visibility and clarity are crucial. I use these lenses in my Oakley Flak 2.0 XL, and despite owning eight different pairs of prescription Oakley sunglasses, the Transitions have become my go-to due to their practicality and versatility.
They adapt well to varying light conditions, which means you can wear them during both daytime and night rides. However, it's important to note that the Transitions Gen 8 lenses won't darken inside a car, as windshields block UV light, which is necessary for the lenses to change tint.
In terms of cost, while these lenses are not cheap, investing in quality vision and eye protection is essential. Oakley's technology and the value they provide for the price are unmatched, making them a worthwhile investment for anyone serious about their eyewear.
For a comprehensive understanding of how Transitions lenses work, their limitations, and how to clean them correctly, I recommend checking out a couple of detailed YouTube videos: