DA-10 OptiVISOR 10 Dioptre

OptiVISOR 10 Dioptre or 3.5 power. Works best at 10cm,[4]

OptiVISOR Precision Binocular Headband Magnifier

OptiVISOR Magnifier #10 (Glass Lenses)

The Genuine Donegan OptiVISOR is a precision binocular headband magnifier that permits unrestricted user efficiency while reducing eye strain. It

Donegan OptiVISOR DA-5 2.5 X Magnification at 8

Quasar LED Light Attachment for Optivisor Magnifying Visors

A2UD Head-mounted Welding Repair Tools Magnifier Head Band Optivisor Eye Loupe 4 Lens - AliExpress

Eschenbach 4X Lighted Mobilent Magnifier - Vision Forward

LP10 Optivisor Lens Plate #10 Multi-Colored

OptiVISOR Head Band Magnifier Visor – ZOIC PalaeoTech Limited

OptiVisor LX-4 Binocular Magnifier - 2X at 10 inches —

Optivisor GLASS Binocular Magnifier – uptowntools