Lenses are ground and polished to precision ophthalmic standards.
The optivisor frame is made of lightweight,durable impact resistant materials.
The comfortable continuous headband is fully adjustable to fit any size,quickly and easily.
Adjustable pivot knobs hold visor in any position for easy flip-up viewing.
Interchangeable lens plates are available for various applications.
Len plate no. 2,4,5,10.
Focus:20 inches,10 inches,8 inches,4 inches.