Optical apparatus and instruments; eyeglasses; goggles for sports; ski goggles; sunglasses; safety goggles; spectacle frames; spectacle lenses; spectacle lenses with electronically modifiable transmission; eyeglasses with eyeglass lenses with electronically modifiable transmission; spectacle frames with an embedded electronic system for use with spectacle lenses with electronically modifiable transmission; spectacle cords; straps for sunglasses; lanyards for sports glasses; spectacle cases; cases for sports glasses; cases for sunglasses.