16 C.F.R. § 315.2
For purposes of this part, the following definitions shall apply:
Business hour means an hour between 9 a.m. and 5 p.m., during a weekday (Monday through Friday), excluding Federal holidays. "Business hour" also may include, at the seller's option, a prescriber's regular business hours on Saturdays, provided that the seller has actual knowledge of these hours. "Business hour" shall be determined based on the time zone of the prescriber.
"Eight (8) business hours" shall be calculated from the time the prescriber receives the prescription verification information from the seller, and shall conclude when eight (8) business hours have elapsed. For verification requests received by a prescriber during non-business hours, the calculation of "eight (8) business hours" shall begin at 9 a.m. on the next weekday that is not a Federal holiday or, if applicable, on Saturday at the beginning of the prescriber's actual business hours.
Commission means the Federal Trade Commission.
Contact lens means any contact lens for which State or Federal law requires a prescription.
Contact lens fitting means the process that begins after an initial eye examination for contact lenses and ends when a successful fit has been achieved or, in the case of a renewal prescription, ends when the prescriber determines that no change in the existing prescription is required, and such term may include:
Contact lens prescription means a prescription, issued in accordance with State and Federal law, that contains sufficient information for the complete and accurate filling of a prescription for contact lenses, including the following:
Direct communication means completed communication by telephone, facsimile, or electronic mail.
Issue date means the date on which the patient receives a copy of the prescription at the completion of a contact lens fitting.
Ophthalmic goods are contact lenses, eyeglasses, or any component of eyeglasses.
Ophthalmic services are the measuring, fitting, and adjusting of ophthalmic goods subsequent to an eye examination.
Prescriber means, with respect to contact lens prescriptions, an ophthalmologist, optometrist, or other person permitted under State law to issue prescriptions for contact lenses in compliance with any applicable requirements established by the Food and Drug Administration. "Other person," for purposes of this definition, includes a dispensing optician who is permitted under State law to issue prescriptions and who is authorized or permitted under State law to perform contact lens fitting services.
Private label contact lenses mean contact lenses that are sold under the label of a seller where the contact lenses are identical to lenses made by the same manufacturer but sold under the labels of other sellers.
Provide to the patient a copy means giving a patient a copy of his or her contact lens prescription:
Reasonably understandable volume means at an audible level that renders the message intelligible to the receiving audience.
Slow and deliberate manner means at a rate that renders the message intelligible to the receiving audience.
16 C.F.R. §315.2