What is anti-reflective coating on lenses?

Anti-reflective coating (AR coating) is important for reducing light reflections and improving eyesight.

To briefly sum it up, instead of acting as a mirror, the coating on anti-reflective lenses allows for light to go through, therefore eliminating reflections on the front and back of your lenses. Other than just improving your eyesight, anti-reflective lenses can also reduce eye strain and also tend to look nicer!