An individual is deemed to be engaged in the occupation of dispensing optician when the individual prepares and dispenses lenses, spectacles, eyeglasses, or appurtenances thereto to the intended wearer thereof on written prescription from physicians or optometrists duly licensed to practice their professions, and in accordance with the prescriptions interprets, measures, adapts, fits, and adjusts the lenses, spectacles, eyeglasses, or appurtenances thereto to the human face based on the prescription or for the aid or correction of visual or ocular anomalies of the human eyes, or when the individual offers to sell or sells non-corrective contact lenses.