Anti-scratch lenses
Anti-scratch lenses are coated with a silicone based hard coating. The advantages of this coating are:
Coated lenses are easy to clean
Coated lenses are not affected by mirrored lenses
Coatings will not wash off
Coatings provide a high gloss finish
Permanent coatings maintain anti-scratch resistance for at least two years (anti-scratch coatings do not affect the optical characteristics of the lens)
Coatings protect against most chemicals and solvent, including:
Glycol ethers
Aliphatic and aromatic solvents
Alkali/alkaline earth solutions
Low and high molecular weight alcohol
Anti-reflective coating
Most safety lenses are treated with an anti-reflective (AR) coating to improve light transmission, minimize glare and increase optical clarity. AR coating is typically standard on radiation lenses.