The Original Donegan Optivisor features a dial adjustment headband to fit any head size. This quality, well-made headband magnifier is lightweight yet durable enough for many years of daily use.
Fits over most eyeglasses. Adjustable pivot assembly on the magnifying visor can be set to desired tension so it will stay in place when tilted.
Quality glass Optivisor lens
3-1/2x Glass Lens, 4" Focal Distance