Which statement about prescription accuracy best describes proper dispensing?

• A. The Rx, if filled properly, will always provide 20/20 vision
• B. The Rx should provide the intended correction when properly implemented
• C. The Rx guarantees no discomfort
• D. The Rx is irrelevant to lens alignment

Answer: (B)

Accurate dispensing means delivering exactly the correction prescribed and making sure it’s applied correctly in the glasses. When the lens powers, cylinder and axis (for astigmatism), and any prism are manufactured and mounted according to the prescription, and the frame is fitted so the lenses sit correctly in front of the eyes, the wearer receives the intended refractive correction. Achieving 20/20 vision isn’t guaranteed, because many factors influence acuity beyond the prescription, such as eye health, lighting, and neural processing. Discomfort can occur even with a correct prescription if the fit, edge design, or adaptation isn’t right. The prescription also isn’t irrelevant to lens alignment—proper alignment with the pupil, correct axis orientation, and proper decentration are essential for the correction to work as intended.