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Dispensing opticians interpret written prescriptions to determine the specifications of lenses. They recommend spectacle frames, lenses, and lens coatings after considering the prescription and the customer’s occupation, habits, and facial features. Dispensing opticians measure clients’ eyes, including the distance between the centres of the pupils and the distance between the ocular surface and the lens. For customers without prescriptions, dispensing opticians may use a focimeter to record spectacle measurements in order to duplicate the spectacles. They also may obtain a customer’s previous record to re-make spectacles or contact lenses, or they may verify a prescription with the prescribing optometrist or ophthalmologist.