This document specifies the reference test methods for determining the spherical, cylindrical, prismatic
refractive properties of afocal unmounted lenses and the spherical, cylindrical and prism imbalance for afocal
mounted lenses of protectors.
This document does not apply to any eye and face protection requirement standards which refer to other test
method standards.
Other test methods may be used if shown to be equivalent.
Registration number (WIID)
66419
Scope
This document specifies the reference test methods for determining the spherical, cylindrical, prismatic
refractive properties of afocal unmounted lenses and the spherical, cylindrical and prism imbalance for afocal
mounted lenses of protectors.
This document does not apply to any eye and face protection requirement standards which refer to other test
method standards.
Other test methods may be used if shown to be equivalent.
