Facts about Polarized Sunglasses and Exposure to UV Rays
Proper sun protection for your eyes:
- Not all sunglasses block 100 percent of UV rays. The lens material and coatings applied to the lens determine the amount of UV protection sunglasses provide, not the color and darkness of a sunglass tint. Polycarbonate plastic sunglass lenses absorb essentially all UV radiation, with the added advantage of extreme impact resistance.
- Different tints can help you see better in certain conditions and reduce glare and reflections by changing the quantity and quality of light entering the eye, but the color and darkness the tint of the sunglasses lens do not necessarily indicate the UV protection provided.
- Wear sunglasses even when you're in the shade. Your eyes will still be exposed to UV rays reflected from water, pavement, snow, sand, windshields and other surfaces.
- Wear sunglasses in winter. Snow reflects more UV rays than most other surfaces. Take care of your eyes when you ski, snowboard, snow-shoe, snowmobile, shovel or any other outdoor winter activity.
- UV light can go right through clouds even when it is overcast.
- The sun's rays are strongest between 10 am and 2 pm so be sure to wear proper sunglasses especially during those hours.
- UV can reach the eyes from the sides and top of sunglasses, even with lenses that absorb all UV radiation. Polarized sunglasses with large, wrap-around style, sport wrap frames are good for peripheral protection.
Advantages of Polarized Sunglasses
Good quality, proper fitting, UV-protective sunglasses with polarized lenses in combination with other features can enhance your outdoor activities and sport experiences, whether you enjoy boating, fishing, in-line skating, mountain biking, skiing, hiking, kayaking, waterskiing, jet skiing, windsurfing, sailing, driving or just relaxing.
Too much unprotected exposure to UV radiation can cause “photokeratitis” – a sunburn of the eye. The symptoms are temporary eye redness,uncomfortableness, light sensitivity and tearfulness. Fortunately, these symptoms are usually short-lived, although long periods of UV radiation exposure can sometimes cause permanent eye damage. "Snow blindness" is the common term for severe photokeratitis, which causes temporary vision loss usually lasting 24-48 hours.
The closer to 100% protection a pair of sunglasses provide,
the safer your eyes will be from damage.
- Polarized sunglasses reduce glare reflected off of water, snow, roads and other surfaces.
- Polarized sunglasses cut glare and haze to improve visibility and comfort.
- Polarized lenses contain a special filter that block intense reflected light, reducing glare.
- Polarized sunglasses are good for driving, reducing glare from the road, car and windshield.
All Coyote Eyewear sunglasses provide
100% protection from harmful ultraviolet rays
including UVA, B and C.
Lens Tints - Colors and Vision
Different tints can help you see better in certain conditions and reduce glare and reflections by changing the quantity and quality of light entering the eye.
- Copper, Brown or Dark Amber lenses
Absorb the blue end of the visible spectrum, improving contrast on grass and against blue skies.
- Yellow or Orange lenses
Improves contrast in overcast, hazy, low-light conditions outdoors or for indoor sports.
- Amber, Rose or Red lenses
Heightens contrast in partly cloudy and sunny conditions. Poor color balance.
- Green lenses
Improves contrast somewhat while preserving color balance.
- Gray lenses
Reduces overall brightness while preserving normal color.
Performance-Enhancing Lens Features:
The darkness and color of tint on sunglasses are not reliable indicators of their UV protection ability. A light yellow colored lens can provide the same UV protection as a dark gray lens.
Other performance-enhancing features may be desirable in your choice of sport sunglasses.
A good choice for sports sunglasses is polycarbonate lenses. These lenses are lightweight and shatter-resistant, and they block 100 percent of the sun's harmful UV rays without extra additives or coatings.
- Polarized sunglasses
Contain a special filter that selectively blocks light reflecting from horizontal surfaces.
- Anti-reflective coating
Coating on the back surface of sport sunglasses lenses to reduce reflected glare from sunlight behind you.
- Mirror coatings
Useful in very bright conditions, they can block an additional 10-60% of visible light.
- Photochromic lenses
Tints that lighten and darken automatically in changing light conditions.