Conn. Agencies Regs. § 20-141-6
Optical glasses to aid vision are the means for correcting eyesight defects when own as complete glasses, or when adapted to the ultimate wearer or consumer, of which the component parts, i.e. lenses and supporting materials, are produced or reproduced to individual specific formulas; and which given formulas include the Rx for foci, lens power, the specifications or mold for the form, size, shape and structure of the lens and/or of the supporting material and indications for the proper placement for fitting to the eyes and for their fitted application, such as the centers, the plane and the angle. Such optical glasses are referred to as optical glasses from given formulas, ophthalmic glasses or instruments from given formulas and eye glasses.
Conn. Agencies Regs. § 20-141-6