Sunglasses protect your eyes from harmful ultraviolet (UV) rays, reduce eyestrain in bright conditions and shelter you from flying debris and other hazards. Finding the proper pair is essential to your comfort, if you’re driving to work or climbing a mountain.
All sunglasses offered at REI block 100 percent of ultraviolet lighting. UV protection information ought to be printed on the hangtag or price sticker of any sunglasses you buy, wherever you purchase them. If it isn’t, find a different set.
Kinds of Sunglasses
Casual sunglasses: Greatest for casual use and fundamental recreational activities, casual sunglasses perform an excellent job of ridding your eyes from the sun as you drive to work and walk through town. Casual sunglasses are typically not designed to manage the degree of action sport.
Sport sunglasses: Designed for activities such as jogging, biking and hiking, sport sunglasses provide light weight and also an excellent match for fast-paced adventures. High-end lens and frame materials are more impact-resistant and elastic compared to casual sunglasses. Sport sunglasses also generally contain grippy nose pads and temple ends, a feature that helps maintain the frames in place even if you’re sweating. Some sport sunglasses consist of interchangeable lenses so you can make alterations for different light requirements.
Glacier glasses: Glacier glasses are special shades designed specifically to shield your eyes from the intense light at high altitudes and sunlight reflecting off snow. They often feature wrap-around extensions to block light from entering the sides.
Polarized lenses: Polarized lenses substantially reduce glare. Polarization is a great feature if you enjoy water sports or are especially sensitive to glare.
On occasion, polarized lenses react with all the tints in windshields, creating blind spots and diminishing the visibility of LCD readouts. If this happens, consider mirrored lenses as a glare-reducing alternative.
These lenses actually get darker on sunny days, and lighter when conditions get darker.
A couple of caveats: The photochromic process takes longer to work in cold conditions, and it does not operate at all when driving a car because UVB rays do not penetrate your windshield.
Interchangeable lenses: Some sunglass fashions come with interchangeable (removable) lenses of various colours. These multi-lens systems permit you to tailor your eye protection to your activities and requirements. Consider this choice if you require reliable performance in a huge variety of situations.
Sunglass Lens Colors (Tints)
Lens colors affect how much visible light reaches your eyes, how nicely you see other colors and how well you see contrasts.
Dark colours (brown/gray/green) are best for everyday use and many outdoor pursuits. Darker shades are meant primarily to reduce through the glare and reduce eyestrain in moderate-to-bright conditions. Gray and green lenses will not distort colors, while brown lenses may cause slight distortion.
Light colors (yellow/gold/amber/rose/vermillion): These colors excel in medium – to low-light conditions. They supply excellent depth understanding, improve contrasts in catchy, flat-light conditions, improve the visibility of objects and create your surroundings appear brighter.
Sunglass Lens Coatings
The costlier the sunglasses, the more likely they are to have a lot of layers of coatings. These may include a hydrophobic coating to repel an anti-scratch coating to enhance durability and an anti-fog coating for humid conditions or high-energy activities.
Mirrored or flash coat refers to some reflective film applied to the outside surfaces of several sunglass lenses. They reduce glare by reflecting much of the light which hits the lens . Mirrored coatings create things appear darker than they are, so lighter tints are often utilized to compensate for this.
Sunglass Lens Materials
The material employed in your sunglass lenses will influence your own clarity, durability, weight and price.
Glass provides superior optical clarity and exceptional scratch-resistance. However, it is heavier than other substances and expensive. Glass will”spider” when affected (but not chip or shatter).
Polyurethane provides exceptional impact-resistance and outstanding optical clarity. It’s flexible and lightweight, but expensive.
Polycarbonate has exceptional impact-resistance and very good optical clarity. It’s affordable, lightweight and low-bulk, however less scratch-resistant.
Choosing a framework is almost as essential as the lenses, since it contributes to a sunglasses’ comfort, durability and security.
Metallic is simple to adjust to a face and less obtrusive to your area of vision. It’s more expensive and less durable than other forms, and it is not for high-impact pursuits. Remember that metal can get too hot to wear if left in a closed-up car. Particular metals include stainless steel, titanium and aluminum.
Nylon is inexpensive, lightweight and stronger than metal. Some nylon frames possess high impact-resistance for sports. These frames aren’t flexible, unless they have an internal, adjustable cable core.
Acetate: Sometimes called”handmades,” these variations of plastic are widely used on high-style glasses. More color varieties are possible, but they’re less flexible and forgiving. Not meant for high-activity sports.
Castor-based polymer is a light, durable, non-petroleum-based material derived from castor plants