Operations involving heat may also involve light radiation. As required by the standard, protection from both hazards must be provided. Tinted and shaded lenses are not filter lenses unless they are marked or identified as such. Wearers of contact lenses must also wear appropriate eye and face protection devices in a hazardous environment. Caution should be exercised in the use of metal frame protective devices in electrical hazard areas.
Atmospheric condition are the restricted ventilation of the protector can cause lenses to fog.
Frequent cleansing may be necessary. Ventilation should be adequate, but well protected from splash entry. Eye and face protection should be designed and used so that it provides both adequate ventilation and protects the wearer from splash entry. Protection from light radiation is directly related to filter lens density. Select the darkest shade that allows task performace.