If fogging has ever been an issue while wearing Prescription Ski Goggles the Smith Phenom Turbo may be a better choice that this Phenom. The Rx Ski Goggles lens is a little closer to your face, so it is more likely to fog up than the goggle lens. The Smith Phenom Turbo has a small 2-speed fan that moves air over lens and clears fog instantly.
The best way to conceal an insert in a goggle is to have a mirrored lens. The Ignitor Mirror lens is the most popular. The Platinum Mirror lens is the darkest lens. The Sensor Mirror lens is for low-light or very cloudy days. The RC-36 lens has the same 36% light transmission as the Ignitor Mirror lens. The RC-36 lens does not have a mirror coating. (RC = Rose Copper)