Optical lens covers that improve light output and uniformity and protect the LED, sold as a feature of an LED lighting system

Intraocular and intracorneal lens implants and shunts for devices implantable in or on the eye to improve vision

Optical lens covers that improves light output and uniformity, and protects the LED sold as a feature of an LED lighting system

LENS, MIRROR OR MAGNIFYING GLASS, CONSISTING OF RIGID INTERFITTING THREADED SLEEVES WITH RESILIENT OPTICAL DIAPHRAGM ELEMENTS AT EACH END, WHOSE FOCAL LENGTH IS CAPABLE OF BEING MANUALLY ADJUSTED OVER A CONTINUOUS RANGE, FOR USE IN DEMONSTRATING AND/OR TESTING OPTICAL PRINCIPALS IN EDUCATION