Active eye wear

Adjustable direct endoscopic optical coupler

Adjustable eyeglass mount for a head set

Adjustable length temple for spectacles

Adjustable optical coupler device

Adjustment attachment for spectacle temples

Adjustment lever for attachment to a scope adjustment ring

Afocal telescope converter attachment for a binocular or similar

Agglutination viewer with fiber optic light pipe and magnetic ma

Alignment ring for camera lens

Apparatus for depositing cell sample on microscopic slide

Apparatus for depositing cell samples on microscope slide

Apparatus for depositing cell samples on microscopic slide

Apparatus for viewing gemstones

Article holder with magnifying lens

Article holder with magnifying lens

Assembly of magnifying lens for use with phones, cell phones...

Astro aimer

Astronomical telescope

Astronomical telescope