Boating Sunglasses are different from most other sunglasses as the water and sun environment is particularly harsh on ones eyes. Having a good pair of Sunglasses is essential on the water. Sun can damage your eyes, and glare off the water makes it difficult to distinguish features, be it wind or whatever lies below the surface.
It is difficult to know which pair of sunglasses are best for you, so we have put together a list of details you should consider.
|UV protection||Protection against UVA & UVB rays|
|Polarized lens||Reduces glare off water, the best boating sunglasses are polarized|
|Lens Material||Lenses are made from glass or plastic materials|
|Lens tints||Tints filter out enough of the right kind of light to reduce brightness without eliminating what you need to see.|
|Lens coatings||Mirrored coatings reflect glare but scratch, hydrophobic coatings repel water|
|Frame||Frame designs and materials help keep sunglasses in place|
|Fit & Feel||Sunglasses should hold in place, but not pinch or rub|
The FDA, the government agency that oversees sunglass manufacture and sales in the U.S., recommends you look for sunglasses with lenses that block 99-100% of UVA and UVB radiation. The label should read either UV 400 or 100% UV protection.
Polarized lenses are essential on the water to block reflection and glare from interfering with your vision. Polarized lenses enable you to read not only the water surface, but also any object that may be just under the surface of the water.
Light striking flat surfaces, such as water or snow, is reflected perpendicular to that surface ie vertical. Polarized lenses, through the horizontal alignment of polarizing micro crystals, blocks all vertical light.
|Lens Materials||Example of lens type|
|Acrylic||Acrylic lenses are the cheapest. They certainly do not have the optics of glass lenses, but they may do for many applications.||Gill|
|Polycarbonate lenses||Polycarbonate plastic lenses are the lightest, and are also almost shatterproof. Polycarbonate lenses vary in price from cheap to the most expensive, due to the coatings which improve optics.||Switch Vision Baby Banz Ocean Racing|
|CR-39||A plastic used mostly in prescription-grade lenses. CR-39 is the most common plastic lens, due to low weight, high scratch resistance, and low transparency for ultraviolet and infrared radiation||Costa Del mar|
|SR-91||Kaenons proprietary SR-91 lens combines the superior optical quality of the finest glass and the lightest weight, strength and impact resistance of polycarbonate.||Kaenon|
|Optical Glass||Glass gives the best optics and scratch resistance. Optical Glass Lenses are ground and polished to the exact thickness of the lens to assure a distortion-free lens. Glass lenses are expensive and can shatter.||Maui Jims
Costa del Mar
|Photochromic lens||Photochromic lenses provide unique climatic management technology, getting dark from low to high light transmission within few seconds; Polarized Photochromic enhance contrast and depth perception while providing unparalleled eye protection.||Rudy Project|
CR-39R plastic lenses absorb about 88 % of UV light Polycarbonate lenses, absorb 100 % of UV light
Tints filter out enough of the right kind of light to reduce brightness without eliminating what you need to see. Reflective coatings reflect the color wavelength.
Early morning, dusk or overcast conditions. With less ambient light outside you need more light coming through the lens to your eyes and a way to enhance the details. Think about Photochromic, light adjusting lenses that will adjust as the day lightens or darkens. Interchangeable lenses will allow a wider variety of light conditions.
Mid-day, cloudless and full sunlight days. Bright sun conditions mean lots of glare and you need a way to block the light and eliminate the glare without losing the details. Mirrored coatings will help cut the glare. Interchangeable lenses will allow you to quickly adapt to changing light conditions.
|Tint and color|
|Solid Tinted Lenses;||These lenses are evenly tinted across the entire lens to cut glare from all directions.|
|Gradient Tinted Lenses;||These lenses are darker at the top and lighter at the bottom to cut overheard glare and provide clearer vision straight ahead and when looking down.|
|Double Gradient Lenses;||These lenses are darker at the top and bottom and lighter in the center to cut overhead and reflected glare from the ground and provides clearer vision straight ahead.|
|Gray/Green-Gray Lenses;||Best for sunny and bright days. These general purpose lenses allow colors to appear without distortion, glare or light pollution. These neutral tones are a popular choice and improve contrast, visibility, and depth perception.|
|Brown/Amber/Copper Lenses;||Best for medium to bright light. Lenses tinted with shades of brown, amber, or copper sharpen contrast and reduce glare. These tints reduce glare and improves contrast and visibility by selectively filtering blue light – great for driving, golfing, water and snow sports also improve visibility while driving..|
|Yellow/Rose Lenses;||Best in low light. Neutralizes blue light which heightens contrast, making objects look sharper on hazy or cloudy days, when light is compromised. Red tints enhance color contrast.|
Many sports-optimized sunglasses have interchangeable lens options. Lenses can be easily removed and swapped for a different colored lenses.
Switching lets you have the benefit of the right lens in cloudy days or bright sunshine.
Switch vision is one Company making lenses and frames with magnets. The powerful magnets pull the lens into place which makes changing much easier.
Lens coatings can dramatically increase the quality of a lens. This list is some of the coatings available.
- Mirrored coatings reflect glare but are prone to scratching
- Scratch resistant coatings
- Anti fog coatings
- Hydrophobic coatings repel water
Nylon frames are usually best because they are lightweight and flexible. They can bend and return to their original shape instead of breaking when pressure is applied to them.
When testing sunglasses look to see if the sides and nose have the required grip. Look at the frame material at the contact point. Where the frame sits on the temple is where you get the grip. Many manufacturers use special rubber materials that actually increase grip in humid conditions. Look for a frame that has a large contact area on the temple.
Costa Del Mar Turbine & Fathom frames use Hydrolite, a rubberized composite combined with an advanced nylon material to produce a frame that is extremely comfortable and really grips the head in extreme conditions. Rudy project use a hypoallergenic Megol material.
The bridge of the nose is the second place where sunglasses provide their grip. I have used sunglasses that used to slide around when it was hot and sweaty, in this case the nose piece was smooth plastic. Look for a grippier material for the nose.
Wrap around sunglasses and frames that fit close to the head are best. Boating is an activity sport so the function of sunglasses that stay in place is more important than style.
Wiley X polycarbonate these wrap around lenses are especially designed for fishing. The climate control stops wind and particles getting between the glasses and your eyes.
These glasses have a built in strap. These glasses are perfect for active water sports where you need to make sure your sunglasses stay put.
Activities include Windsurfing, kite boarding, and high speed water sports.
Glossary terms from technical-gear.com
Acetate Type of plastic often used in eyeglass frames and lenses.
Acrylic Plastic Lenses made of this will weight less and are the least expensive. They are soft and wills scratch very easily and must be specially treated to block UV rays.
ANSI The American National Standards Institute has served in its capacity as administrator and coordinator of the United States private sector voluntary standardization system for more than 80 years. Founded in 1918 by five engineering societies and three government agencies, the Institute remains a private, nonprofit membership organization supported by a diverse constituency of private and public sector organizations.
Anti-reflective (AR) Coating Thin layer(s) applied to a lens to reduce the amount of reflected light and glare that reaches the eye.
Authentic Rx Lens Comes directly from the frame manufacturer, thereby giving you all the features of that manufacturer’s specialty lens with your custom prescription. Often, the manufacturer’s logo is etched onto the lens as a symbol of authenticity. Please note these are custom orders and are NON-REFUNDABLE.
Aviator Glasses Eyewear like those that aviators used to wear; they usually have a metal frame and large, tinted lenses.
Blue Light A portion of sunlight which is blocked by yellow or amber lenses. Some people feel that filtering out blue light increases contrast, and makes distant objects appear more distinct.
Bridge The part of sunglasses that extends across the nose.
Cable Temple Style of eyeglasses that wraps around the ear, to keep them well-fastened.
Cellulose Acetate Zyl This plastic is medium-weight, flexible, and strong. It’s adjustable with heat and most zyl frame temples have metal reinforcements that will make them stronger.
Clip-on Type of glasses that attaches to your regular glasses, such as clip-on sunglasses.
CR-39 Optical quality plastic, made of hard resin, is considered the best plastic for lenses. It weights half as much as glass and exceeds FDA requirements for impact-resistance.
Flash Coating A highly reflective coating, which greatly reduces the amount of light that reaches your eyes. Generally applied over a dark sunglasses lens, but can be applied over any base color. Mirror coated lenses absorb anywhere from 10% to 60% more light than uncoated lenses. These are good for higher altitudes, sand, water and snow. Although the most common are the silver, gold and copper metallic coatings, you will find many colors available nowadays. *Also called Mirror Coating
Glare Caused by a direct light source (the sun) or is reflected from a surface (roadway, water). Your eyes can be subjected to more than 10 times the level of light you need to see. When it reaches these levels it will become physically painful.
Gradient Coating Permanently shaded from top to bottom. A double-gradient lens is dark at the top and bottom and lighter in the middle.
Graphite Combines carbon and fiberglass materials, it is extremely lightweight and strong.
Grilamid In theory, a rugged, resilient frame material that’s specially formulated for flex, impact strength and dimensional stability. In practice, it’s tough enough to withstand the most aggressive physical punishment your body is willing to endure.
Ground and Polished Some non-prescription glasses are ground and polished when they are manufactured to improve the quality of the lenses. If glasses are not ground and polished it will not hurt your eyes.
High Index Type of lens with a higher index of refraction, meaning that light travels faster through the lens to reach the eye than with traditional glass or plastic. It is denser, so the same amount of visual correction occurs with less material (whether glass or plastic) — so the lens can be thinner.
Hydrophilic Used in frame temples and nose pads, giving them more adhesion with high moisture. This means the more you sweat the more adhesion it delivers.
Hydrated Nylon The industry’s most durable material, virtually unbreakable with memory that returns to its original shape. Providing a lightweight fit for unmatched comfort during any activity.
Impact Resistant Polycarbonate used in lenses and frames are safer than traditional materials because they aren’t brittle and hold up better under impact. They tend to absorb the impact rather than shattering, but this is not a guarantee of non-breakage.
Infrared (IR) Radiation Long wavelength rays, sometimes called “heat waves”. Half of the sun’s energy is infrared, IR is stronger at high altitudes. Electric heaters, house radiators, and ordinary light bulbs also emit infrared energy. The rays cause the skin to feel hot and may contribute to the discomfort caused by exposure to bright light.
Megol Soft and pliable rubber, Megol gives a comfortable and slip-resistant fit.
Metal Frames Frame metals usually start with base metals that are copper or nickel alloys. They are then plated with fine metals, such as gold, to give them a rich finish.
Mirror Coating A highly reflective coating, which greatly reduces the amount of light that reaches your eyes. Generally applied over a dark sunglasses lens, but can be applied over any base color. Mirror coated lenses absorb anywhere from 10% to 60% more light than uncoated lenses. These are good for higher altitudes, sand, water and snow. Although the most common are the silver, gold and copper metallic coatings, you will find many colors available nowadays. *Also called Flash Coating
Monel Durable memory nylon material, virtually unbreakable with memory that returns to its original shape.
Nylon Lightweight and durable synthetic material, derived from coal, water, and air which is very flexible.
Optically Correct Lens When looking through a non-optically correct lens, you will continually refocus due to distortion. This leads to eye strain/fatigue, causing headaches, nausea and dizziness.
Optyl A plastic material made especially for eyeglass frames. Optyl is 25% lighter than other plastics. It is hypoallergenic and has a memory, that is, it returns to its original shape if pulled out of adjustment.
Peripheral Vision The edges of your visual field. Most commonly refers to the left and right sides of your eyes.
Photochromic Coating Will automatically darken and lighten when the light changes, although the cheaper photochromic lenses wont’ get very dark and take some time to adjust to different conditions. It will require conditioning the lens first, through several exposures to the sun in order to darken fully.
Polarized Lenses A filter sandwiched between the front and back surface of the lens which filters out horizontally reflected glare and allows you to see through reflected glare on the surface of water, snow, ice, glass etc. Ideal for water sports or winter sports where the water and snow increase the reflected glare. Absorbs 98% of the reflected glare.
Polycarbonate Remarkable strong plastic. It weighs the least and is the most impact-resistant making it a perfect choice for rugged sunglass frames and lenses. The lens will also offer built-in ultraviolet protection.
Protective Glasses Eyewear made with impact-resistant lenses, usually polycarbonate, that protects the eyes, especially in working situations or sports.
Safety Glasses Both the frame and lenses must pass ANSI standards. The frames are more durable than fashion frames and the lenses must be able to pass a “drop ball” test. This involves dropping a hard ball onto the lens from a certain height. If the lens cracks or shatters, it fails.
Serilium A combination of polycarbonate plastic and nylon that has the same durability as nylon, but is sturdier.
Silicon Type of flexible and comfortable plastic. because it is commonly used in nose pads in eyeglasses, people who are allergic to silicone should be aware and seek a different type of nose pad.
Spring Hinge Type of hinge on eyeglass frames that is more flexible than a regular hinge, making the frames more durable and better fitting.
Temple The “arm” of a pair of glasses, running from the ear to the lens area.
Titanium A type of metal alloy that is very strong. Eyeglasses made of titanium are lightweight, durable and often hypoallergenic.
Ultraviolet (UV) Rays The invisible part of the light spectrum whose rays have wavelengths shorter than the violet end of the visible spectrum and longer than X-rays. UVA and UVB light are harmful to your eyes and skin. UVC are blocked in the upper atmosphere and almost never reach the earth.
Visible Light That part of the sun’s energy that you can see. it is made up of a spectrum of colors; red, orange, yellow, green, blue, and violet. The eye is not equally sensitive to all of these colors. It is most sensitive to yellows and greens which it can see the best. The eye is less sensitive to reds and blues.
Wrap-around (wrap) Type of eyeglass frame that curves around the head, from the front to the side. Wrap-around sunglasses tend to offer extra sun protection because the lenses usually wrap as well.