Street signs that look softer than they used to, reading that tires you quickly, or a habit of pushing your glasses up to read can all suggest your prescription has changed. Headaches, more frequent screen breaks, and trouble with night driving are worth mentioning too. None of these mean something is seriously wrong, but they do deserve a check.
Online vision tests and old prescriptions cannot tell you whether your eyes are healthy. An in-person assessment confirms your current needs and looks for concerns that new glasses alone would not fix. That way, any new lenses you choose are based on an accurate picture.