Eyeglasses-The term includes optical lenses, eyeglass frames, eyeglass temples and other components necessary to make optical lenses suitable for human wear.
Optical Lenses-The term includes prescriptive and nonprescriptive lenses, contact lenses, tinted lenses for sunglasses, lenses for items as ski goggles and diving masks, and other similar optical lenses, whether the lenses are glass, plastic or other material.
61 Pa. Code § 52.4