09/18/2026
Prescriptions carry expiration dates, usually one to two years out, and people reasonably assume it is a mechanism to make them come back. It genuinely is not.
A prescription is a medical finding about your eyes on the day it was written. Vision shifts. More to the point, the exam that produced it also checked things a prescription never records: the pressure inside your eye, the health of your retina and optic nerve, changes to the surface of the eye. An old prescription tells us nothing at all about any of that. The number is the smallest part of what happened at that appointment, and the rest of it is what complete vision care means.
Filling glasses or contacts from a lapsed prescription can also leave you with a fit that no longer matches your eyes.
If yours has expired, updating it is a short visit. Call us at (865) 584-0905.