Vision in the sun can become problematic as one ages or recovering from an eye procedure. The pupil becomes less responsive and lets in less light. Drivers over 65 years old may only receive half of the light transmission they did when they were in their 30s; which can potentially make driving problematic and possibly dangerous. As the eye ages; it becomes more light sensitive; making oncoming light more challenging to see past. Sunglasses that fit over your prescription glasses reduce oncoming glare with an anti-reflective lens system that also blocks high energy visible blue light. If you do not require prescription glasses to drive or read; do not worry; you can still wear these fit overs as everyday sunglasses. This pair of sunglasses is effective on a bright sunny day. Your eyes will always remain relaxed and focused. No more eye-strain and fatigue. Polycarbonate Shatterproof Lenses - These lenses enhance your visual acuity; reduce glare and prevent eye strain. They also increase contrast and provide 100% UVA/UVB protection. Extra large frames will virtually fit over any size prescription glasses. Wrap-Around Frames - As much as 20% of UV light can reach the eyes by coming in through the sides of sunglasses. Fit over frames are wrap-around and block light from above and both sides while increasing depth perception. Great frame design for golf; cycling; running; fishing and all active outdoor activities. The super light acetate frame: You can hardly feel them on your face for the most comfortable fit available today in addition to unparalleled durability. Great fashion frame design for driving; golf; cycling; running; fishing; reading and all outdoor activities. 100% UV protection lenses. Fashion and stylish design. Eliminate reflected and scattered glares. Works great in the wind. Good for sports or other outdoor activities.