Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Originally Posted by SirScott
A few of the Rudy Project frames actually support Rx lenses as well, not just the inserts. Just FYI
While it's relatively easy to produce prescription lens for non-wrap sunglasses, those that have a lot of wrap-around that's recommended for activities such as cycling are more difficult to create in prescription format... especially if the wraps use a rimless design. Many brands of high-end sunglasses allow for prescription via clip-on/in inserts. These are typically subframes that can accept a prescription ground lens.
There are several issues however with inserts.
- You're now staring through two lenses which can cause a bit of distortion due to having light refracted through four optical surfaces.
- Sweat, water and bugs can get trapped between the insert and the main lens.
- It's hard to get the proper airflow and temperature balance to keep fogging from occurring between the insert and the main lens
- Makes you look even more goofy
In general, I only use my inserts for when I'm MTBing and wear my contacts when I'm RBing. I do carry the inserts with me just in case my contacts foul up and I have to ditch them.
Oakley has the ability to embed a prescription lens right into the main wrap lens itself. It's pricey though. For certain models of Rudy Project, Adidas and Smith, there's an outfit called Sports Optical
that will handle custom-grounding of lens that will fit into certain wrap frames but they're very expensive (prices start at $250 I believe). And if like me, you need to have interchangable lenses to match different lighting conditions then you have to get all your different lenses ground with prescription. This can get pretty costly but is the ultimate solution aside from contacts or surgery.