Portwest A925 Disposable Safety Gloves

Single vision occurs when an individual is near sighted or far sighted, but not near sighted and far sighted.

Digital Single Vision lenses are fabricated based on the wearer’s prescription with computer-controlled surfacing equipment that is much more precise than conventional tools. Digital lenses fabrication technology allows for surfacing of lenses in power increments of 0.01 diopter, compared with 0.125 to 0.25 diopter increments possible with traditional eyeglass lens tooling.

A lens with two points of focus – usually one for distance and one for near vision. Bifocal portion of lens is in the shape of a half moon.

A no-line multi-focal lens that includes all corrections, from distance to close-up, in one lens without any separation of the visual zones by a line.

Polycarbonate, a plastic, is the most impact resistant material available for glasses. Polycarbonate is UV resistant and about 50 times stronger than other lens materials.

Polycarbonate, a plastic, is the most impact resistant material available for glasses. Polycarbonate is UV resistant and about 50 times stronger than other lens materials.

Trivex is a high impact lens with optical qualities closer to glass lenses. It has an index of refraction of 1.53, the same as glass or standard plastic so high prescriptions will be thicker. Trivex Material has UV protection built into the lens.

Lenses correct vision by bending light as it passes through the lens. High index plastic lenses are able to bend light more than the conventional plastic used for lenses. This means that high index plastic lenses are thinner and lighter than conventional plastic lenses.

Lenses correct vision by bending light as it passes through the lens. High index plastic lenses are able to bend light more than the conventional plastic used for lenses. This means that high index plastic lenses are thinner and lighter than conventional plastic lenses.

Glass is scratch resistant and provides the clearest possible vision. It is heavier than plastic, but is the most durable lens on the market.

Glass is scratch resistant and provides the clearest possible vision. It is heavier than plastic, but is the most durable lens on the market.

The Blue Blocker lenses are specially crafted to filter out the blue light given off from the digital screens. Which helps reduce potential damage to your retina from prolonged exposure to computers and smartphone screens. Extremely comfortable, it also helps to reduce eyestrain and eye fatigue. Perfect for all day wear.

The Polarized Gray 3 lenses are a darker shade that won’t distort colors. Polarized lenses eliminate the amount of reflecting light that enters the eye, reducing glare, making images appear sharper and clearer, increasing visual clarity and comfort.

The Light Pink lenses provide crystal clear vision. In addition, these pink tints are a blue light blocker and UV protection. Great for increasing depth of field and vision. Extremely comfortable, it also helps to reduce eyestrain and eye fatigue. Perfect for all day wear.

The Orange lenses are recommended for low-light conditions because they make an environment appear brighter. They enhanced contrast and depth perception

The Yellow lenses provide great clarity, being perfect for outdoor activities when you have to focus your eyes on moving objects in low-light, hazy conditions. Filters out blue light. May cause color distortion.

The American Gray G-15 lenses are a gray-green color, present in most of aviator shape sunglasses. Enhanced contrast, these lenses absorb 85% of visible light and block most of the blue light, ensuring better clarity of vision.

The Dark brown lenses enhance contrast, making these lenses great for activities where distance needs to be judged. Recommended for cloudy days or in low-light conditions. Work as a shield against blue color.

The Dark Gray lenses are great for all-purpose use, they are dark enough to provide overall protection. The gray tint allows you to see the objects in their true color while reducing glare. Recommended for both cloudy and sunny days.

The Light Gray lenses are great for all-purpose use. The gray tint allows you to see the objects in their true color while reducing glare. Recommended for both cloudy and sunny days.

The Polarized Brown 3 lenses enhance colors and contrasts and work as a shield against blue colors, which helps reduce the glare you can get from water’s surface. Polarized lenses eliminate the amount of reflecting light that enters the eye, reducing glare, making images appear sharper and clearer, increasing visual clarity and comfort.

The Transition Grey lenses do not alter colors when exposed to light, so the colors you see will be true. Transition Lenses are an optical lens that darkens on exposures to light and clear when this exposure is away.

The Transition Brown lenses enhance contrast and visual acuity in the sun. Works great against blue color, but may cause color distortion in brown tint. Transition Lenses are an optical lens that darkens on exposures to light and clear when this exposure is away.

The Transition Vantage lenses are the first everyday lenses to both darken and polarize in bright, outdoor light. Perfect for outdoors, these lenses help reduce glare, while assure complete UV protection and help protect your eyes against harmful blue light.

The Transition Xtractive New Generation Gray lenses are the darkest Transition lenses available for everyday use. The gray tint will not alter colors when exposed to light. Recommended for outdoors, these lenses also provide automatic ultraviolet.

The Transition Xtractive New Generation Brown lenses are the darkest Transition lenses available for everyday use. The brown tint is great against blue colors, enhancing the contrast. Recommended for outdoors, these lenses also provide automatic ultraviolet. May cause color distortion in brown tint.

The Drivewear lenses provide 100% UV blockage, comfortable anti-glare polarization, high definition contrast, and excellent depth perception. Which also helps you to be safer on the roads.

A scratch resistant coating is often applied to surfaces that are not inherently scratch-resistant, like CR-39 plastic, polycarbonate, or Trivex. It adds a barrier of protection that hardens the surface against both large gouges and smaller scratches, which can build up and crisscross to add a hazy appearance to lenses. If your lenses are formed from any material other than glass, a scratch-resistant coating will increase their productive lifespan.

UV light is invisible to the human eye but can, in excess, cause retinal burning and scarring. Most sunglasses are already designed to block a high level of UV radiation; other lenses, depending on their function or lens material, may also block some UV rays. If your lenses do not specifically state their UV screening level and you spend time outdoors, an additional UV coating will offer protection and peace of mind. Anti-UV treatment is not necessary on polycarbonate lenses because it is an inherent property of the material.

An anti-fog coating works by chemically affecting the adhesion of water molecules, preventing them grouping into larger clusters that can impair vision. If your glasses are frequently exposed to temperature changes or humid conditions, you’ll likely want an anti-fog coating to help combat condensation. The same goes for anyone who engages in strenuous activities such as physical labor, participation in sports, or exercise. Any activity that causes your body temperature to fluctuate will likely lead to lens fogging.

Anti-reflective coatings eliminate the distracting glare that can be produced by light when it reflects through your lenses. Anyone subjected to direct or indirect reflections – especially those who spend a lot of time around computers and electronic monitors of any type, suffer from eye strain, or who drive at night – will likely enjoy the benefits of glare reduction. Due to the high reflective properties of high index lenses, an anti-reflective coating is recommended, and is practically mandatory for high index lenses made of glass. (Note: AR coating is not good for outside glasses, dusty dirty environments and or constant cleaning.) The lenses must be wet before they are cleaned.

Blue Light Plus AR coating is applied in a vacuum coater. The recipe contains anti-static layers, as well as an oleophobic layer to make the glasses easy to clean and stay smudge free. The Blue Light protection is applied to the front side of lens for protection from HEV at 440-480nm. A blue hued AR stack is also applied to the backside of the lens for maximum glare reduction. The coating’s blue hue makes the lenses more attractive.

Silver mirror lenses are one of the most popular colors and lend the wearer a cool, sleek, urban look. This coating on lens exteriors gives them a reflective mirror finish and is available in different colors. It’s an aesthetic choice but also reduces the amount of light passing through the lenses, effectively acting as a tint. Additionally, all our mirrored glasses with come anti-reflective coating on the backside. This coating will not work on transitions, drivewear or clear lenses.

Blue mirror lenses are bright and vibrant, making them an excellent choice for a sunny day at the beach. This coating on lens exteriors gives them a reflective mirror finish and is available in different colors. It’s an aesthetic choice but also reduces the amount of light passing through the lenses, effectively acting as a tint. Additionally, all our mirrored glasses with come anti-reflective coating on the backside. This coating will not work on transitions, drivewear or clear lenses.

Gold mirror lenses offer a luxurious, sophisticated chic with a glittering look that dazzles the eye. This coating on lens exteriors gives them a reflective mirror finish and is available in different colors. It’s an aesthetic choice but also reduces the amount of light passing through the lenses, effectively acting as a tint. Additionally, all our mirrored glasses with come anti-reflective coating on the backside. This coating will not work on transitions, drivewear or clear lenses

Red mirror lenses are warm and sensual, and they’re guaranteed to get the wearer noticed. This coating on lens exteriors gives them a reflective mirror finish and is available in different colors. It’s an aesthetic choice but also reduces the amount of light passing through the lenses, effectively acting as a tint. Additionally, all our mirrored glasses with come anti-reflective coating on the backside. This coating will not work on transitions, drivewear or clear lenses.

Green mirror lenses are serene and calming, perfect for a lazy afternoon floating down the river. This coating on lens exteriors gives them a reflective mirror finish and is available in different colors. It’s an aesthetic choice but also reduces the amount of light passing through the lenses, effectively acting as a tint. Additionally, all our mirrored glasses with come anti-reflective coating on the backside. This coating will not work on transitions, drivewear or clear lenses.

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The Transition Xtractive Polarized lenses combine the benefits of light intelligent lenses and dynamic polarization. The Xtractive Polarized lenses deliver sharper vision, vivid colors, and a larger field of view outdoors.

The Transition Xtractive Polarized lenses combine the benefits of light intelligent lenses and dynamic polarization. The Xtractive Polarized lenses deliver sharper vision, vivid colors, and a larger field of view outdoors.