The Volk LensPen® is designed to clean any coated lens surface, on your BIO indirect, Non - Contact, Contact Diagnostic / Laser, and G - Series lenses, as well as, adapters and filters. However, it is not intended for use on sur-faces that contact the eye. A retractable brush on one end of the pen removes loose particles of dirt. The soft clean-ing pad on the other end, impregnated with a no liquid carbon-based cleaning compound, wipes away smudges, and reduces static charge build-up. This pad also stows away in the pen. The Volk LensPen® is 7 inches long and comes with a clip that attaches to any pocket. Not for use on surfaces that contact the eye.