SNAP ON LENSES TO FIT OPTI MASK MINUS

Negative dioptre lenses for those with near-sighted or myopic vision are available in:

-0.5 dioptre increments from -2.0 to -6.0.

Bifocal lenses for gauge reading and Camera screens are available in:

0.5 dioptre increments from 1.5 to 3.5.