A common lens for gun range and shooting competition use, hi-contrast yellow lenses can reduce haze and sharpen perceived images by filtering blue light. One of the most common lenses used by the military for low-light conditions, hi-contrast yellow lenses improve contrast and depth perception. With an 85% VLT, it's an ideal shade for indoor and other low-light environments.    

To sum it up: Safety-rated lens materials are engineered to protect your eyes from an intense blunt force and fast-moving projectile.
What’s really happening here? Worldwide safety standards require protection from a vast array of impact threats to the eyes, simulating hazards on the jobsite and in real life. Velocities are simulated via a variety of test methods. The high mass impact test uses a heavy, yet slower moving spike directed at the lens. The high velocity impact test utilizes a fast-moving, yet small projectile. And the dart penetration test punishes with a low mass, low velocity sharp object. Edge impact-rated lenses, compliant with a wide variety of international standards, will always be constructed to protect eyes from the most intense impact

To sum it up: Safety-rated lenses must provide the user pristine optical viewing clarity in a wide peripheral plane without image distortion.
What’s really going on here? Safety standards require lenses to undergo a minimum of 10 optical clarity tests that search for any unacceptable level of haze, visual light transmittance, refraction, astigmatism or prismatic power. Each of these tests ensure the lens does not cause images to shift, be incorrectly altered or lose discernable focus. Edge lenses provide a crystal-clear viewing experience with every lens technology and lens color available.

To sum it up: Base curve is defined as the front surface curvature of a lens and is used as a design element to follow face curvature for proper fitting.
What’s really going on here? Effective safety-rated glasses are formfitting and reduce open gaps, which could allow eye threatening particles to enter between the lenses and the user’s face. With the variety of face shapes and sizes to accommodate, properly fitting glasses use a few common ergonomic lens base curves coupled with appropriate frame housing to ensure proper fit and reduction of exposure to the eyes.

To sum it up: Edge lenses are engineered with a tapered lens thickness to ensure images viewed through the lens do not shift and maintain true positioning.
What’s really going on here? All Edge lenses are cut with a gradual taper of thickness, starting in the optical center and growing thinner toward the temporal edge to compensate for visual distortion caused by the curvature of the lens. Without proper tapered lenses, the viewing experience would be, as some describe, “the Coke bottle effect,” causing images in the viewing field to shift side to side or up and down.

To sum it up: All Edge polycarbonate lenses are triple coated with a high-quality scratch resistant material for lens clarity preservation.
What’s really going on here? Polycarbonate material is the most common substrate used for safety glasses, due to its soft, flexible nature. These traits provide the material an incredible ability to absorb impact. The downside of a soft, flexible material is that it is, by its nature, susceptible to scratching. Edge lenses are coated and cured three times during the manufacturing process with a hard-coat, scratch-resistant surface on all lenses.

To sum it up: Ultraviolet (UV) light is a range of non-visible, high-energy wavelengths that cause significant and permanent damage to the eyes if not properly filtered. All Edge lenses filter 99.9% of harmful UV rays.
What’s really going on here? Polycarbonate is an organic synthetic resin, which, due to its molecular structure, is optimal for filtering out 99.9% of dangerous UVC, UVB and UVA radiation. This includes clear lenses. Lens tinting and mirror coatings can also filter and reflect harmful rays away from the eyes. Ultraviolet rays can cause permanent damage to all layers of the cornea, retina and, ultimately, result in the cloudiness of lens cataracts or the burned sunspots of photokeratitis, often referred to as “welder’s flash.”

To sum it up: In 2013, Edge created the industry’s first “military grade,” permanent anti-fog—known as Vapor Shield™. This technology is impervious to fogging, even in the most extreme conditions.
What’s really going on here? Traditional anti-fog solutions are offered as a topical spray, which seldom work and require near-constant reapplication by the user. Some brands have experimented with dipped and spray coatings at the lens manufacturing level, which improved performance, but still does not match the level of Vapor Shield in its ability to resist heated condensation, ambient humidity and steam.

To sum it up: Polarized lenses block distracting glare from reflective surfaces, such as water, sand, concrete or snow. Such glare can lead to tired, strained eyes or ocular migraine headaches.
What’s really going on here? Ever wonder what put Edge on the map? In 1998, we pioneered the world’s first safety-rated polarized glass. The technology is comparable to looking through a set of horizontal blinds. The slats filter light, just as polarized lenses do. The reduction in the amount of light entering the eyes all day is an added benefit of this unique lens technology.

To sum it up: This unique lens technology reduces eye strain. The G-15 lens is engineered to create comfortable, relaxed eyes in extreme light conditions.
What’s really going on here? In the 1930s, the US Air Force engineered the G-15 technology used in this lens for aviators exposed to high altitude and extreme light conditions. The wire frame glasses immediately achieved the nickname “Comfort Cables.” As another first in the industry, along with our pioneering safety-rated polarized lenses, Edge introduced the G-15 lens to the safety industry. These lenses maximize transmission of light in the middle of the visible light spectrum in the colors most easily perceived by the human eye, leaving the eyes relaxed from strain. As an added benefit, the G-15 technology transmits all colors true to life without alteration.

To sum it up: Image definition and depth perception is the distinct advantage of lenses that filter blue light.
What’s really going on here? The blue light spectrum has very short wavelengths immediately following the UV light range. Though the waves are not dangerous to the eyes, they are very difficult to focus in front of the retina and excess amounts cause a sensation called ‘Blue Blur.” Edge lenses that filter out this excess light rays leave the viewing experience crisp, vibrant in the warm color hues and in proper depth relativity.

To sum it up: Mirrored lenses offer unsurpassed visual clarity. This unique lens technology also solves a previous dichotomy of shading the eyes yet keeping images clear and distinct.
What’s really going on here? This fascinating technology was developed by NASA for the portholes of satellites and astronaut helmets to block infrared light and reduce transmission at both ends of the spectrum. Would it be surprising to know that Edge was the first company to bring this lens technology to the safety industry to keep the viewing experience bright and clear, even under the harshest bright light conditions?

To sum it up: Welding lenses filter low (IR3) and medium (IR5) levels of infrared light produced during gas welding, brazing and torch cutting. Potentially dangerous levels of UVC light exist with these activities.
What’s really going on here? Every type of welding machine or welding process should advise a strict recommendation for proper eye protection needed while working. Edge strongly advises users to follow given recommendations for proper eye protection with such intense and dangerous light emittance.

To sum it up: Edge progressive magnifiers come in 1.5, 2.0 and 2.5x power options for viewing intricate work and fine details on the spot, without changing to reading or prescription glasses.
What’s really going on here? Too often, people assume that prescription glasses are safety rated for impact and coverage. Though safety lenses can be made for vision correction, Edge magnifying glasses are a safety-rated, cost-effective solution for image magnification.

To sum it up: In continually changing light conditions, photochromic lenses, featuring auto-darkening/auto-lightening capabilities, are the perfect solution to adjust appropriate light transmission for comfortably shaded eyes.
What’s really going on here? With a transmission time dark to clear in less than 60 seconds, an added benefit of these lenses is that they moderate appropriate levels of light, instead of relying on the eye’s continual pupil dilation. Sore, tired eyes are the result of over-exertion in environments of continually changing light levels. Photochromic lenses are the perfect solution for this need.