Texas Occupations Code - OCC § 353.105. Alteration of Prescription Prohibited

(a) Except as provided by Subsection (b) and Section 353.103, a person dispensing contact lenses may not alter a contact lens prescription.

(b) A person dispensing contact lenses may fill a contact lens prescription that requires a contact lens manufactured by a particular company with another lens manufactured by that company if the lens required by the prescription and the lens with which the prescription is filled are the same lens but are sold by the company under multiple labels to different contact lens dispensers.