AF
Anti Fog
Base Lens
Refers to the curvature of a lens with the number prefix indicating the gradient of curve to a lens – the higher the number the greater the curve. Most wrap around lenses have a rating of 8 – 10.
Blue Light
Unlike UV light, blue light is visible to us. Blue light waves are what makes the sky, or any object, appear blue. Blue light waves are also very short and scatter easily, so a great deal of the glare we experience from sunlight also comes from blue light. This light causes eyestrain and fatigue with the main sources being sunlight and neon light.
Co-Moulded
Double shot, multi-shot injection moulding often known as co-moulding is the process of injection moulding a part having more than one type of colour or material within the one injection moulding tool. The different materials are injected in sequence, each one attaching to, or over moulding the previous shots. Special multi-shot injection moulding machines are required to carry out this type of moulding.
HC
Hard Coat
IR – Infra Red
The heat that we feel from sunlight, a fire, and mechanical generation such as gas welding is infrared and damages the cornea if unprotected and causes a drying effect.
Medium Impact Approved
When an eye protector is subjected to and passes a series of accredited test procedures where a 6.35mm diameter steel ball is projected at a velocity of 40m/sec
Nm
The nanometre is commonly used to measure the wavelength of electromagnetic radiation near the visible part of the spectrum: visible light, in particular, ranges from 400 to 700 nm.
Photochromatic
A photochromic lens is the type of lens that changes its colour/tint depending on the amount of light (ultraviolet rays) that are cast upon the lens. When more light is encountered, the lens becomes darker. Conversely, when less light is shined then the lens becomes lighter in colour.
PC (Polycarbonate)
Polycarbonate is a versatile, tough plastic used for a variety of applications, from bulletproof windows to compact disks (CDs). The main advantage of polycarbonate over other types of plastic is unbeatable strength combined with light weight.
PU (Polyurethane)
Polyurethane is an incredibly resilient, flexible, and durable manufactured material that can take the place of paint, cotton, rubber, metal, and wood in thousands of applications across all fields. Polyurethane might be hard, like fibreglass, squishy like upholstery foam, protective like varnish, bouncy like rubber wheels, or sticky like glue.
UV Ultra Violet
Is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, these invisible light rays are considered harmful to the human eye and if not protected will cause cataract.
UV 380 Lenses
Blocks out 99.9% - 100% of UV rays up to 380 nanometres – mainly used in clear lenses.
UV 400 Lenses
Blocks out 99.9 – 100% of UV rays up to 400 nanometres – mainly used in tinted lenses.
Zero Power
Indicates that there is no lens magnification and is distortion free, providing perfect optical clarity