YES!!
One can purchase prescription snowboarding goggles at various retailers online. One can purchase prescription snowboarding goggles at websites such as US Sport Eyewear, RevZilla, and BestBuyEyeglasses.
The cutting of a prescription lens takes about 15 minutes per lens.
Double lens goggles don't fog up as easily and are more durable than single lens.
Yes, discount contact lens can still match your prescription exactly. All companies have quality standards that they have to meet, so regardless of where you purchase your prescription lens, you will get the same prescription all the time.
To change the lens on Smith Optics goggles, remove the frame from the lens by bending the frame slightly to release it. Once the frame is removed, insert the new lens by lining up the notches on the lens with the tabs on the frame, then snap the frame back in place. Make sure the lens is securely attached before using the goggles.
Yes, biking goggles can be designed to fit over glasses for individuals who wear prescription eyewear.
Moto goggles are single lens, ski goggles are double lens. The double lens reduces fogging, which is nice on the slopes and why ski goggles are more expensive. Also, good ski goggles come with UV protection, but some moto goggles do not.
swimming
Spy Optic is a company that makes sunglasses including the spy happy lens. They also make prescription eyewear and snow goggles and motocross goggles. All information about their products is located on their website.
Sutton Swimwear OPT1 goggles go for £16.00 and OptiSwim for £17.50.
No, you cannot change the bifocal prescription on glasses without changing the lens. The lens is what is prescribed by your eye doctor. The frame, however, can be changed.
Goggles purchased "off the shelf" should not be refractive, i.e. should not have a 'focal length'. I suppose if you're a die-hard compulsive SCUBA diver, you could buy prescription goggles; then their focal length would be whatever suits your prescription. But for anything bought in a sports supply, if it has a focal length, then you're on the road to eye-strain ... take it back !