Knowledge Base

CSA Z94.3 has optional standards for tinted lens sun protection. Tints of 15% or less are still considered “clear” lenses (as defined on Table 1 of the standard), tints up to 60% are considered “Cosmetic”, and tints between 60% and 92% are considered “General Purpose” sun protection (as defined on Table 7 of the standard). Please note that tint percentages beyond 92% are not recommended for daylight driving. Sun protection should also include UV protection, and most labs will require/include UV protection when manufacturing safety eyewear with a tint. Most prescription lens labs will also not tint a lens higher than 85-90%.