OptiVISOR 10 Dioptre or 3.5 power. Works best at 10cm,[4]
LP10 Optivisor Lens Plate #10 Multi-Colored
Transtronics, Inc.
Top 10 Headband Magnifiers
OptiVISOR Head Band Magnifier Visor – ZOIC PalaeoTech Limited
OptiVisor LX-4 Binocular Magnifier - 2X at 10 inches —
New Shipment Hand Picked Optical Tools! — Mitchell Jewelry Studio
Checking out Hobby Magnifying Glasses
Headset Magnifiers and Hobby Magnifying Glasses for Painting Miniatures (Review) - Tangible Day
Optivisor DA-10 : Arts, Crafts & Sewing