Nearly everyone experiences occasional headaches, but for some people, they’re a constant nuisance. The cause of these headaches is often unknown but may stem from various factors such as eyestrain, tension headaches, or even overuse of your eyeglasses. If you’re experiencing frequent headaches you may be sure that your varifocals are the culprit. They can lead to headaches if you’re constantly adjusting them to try and get the focus just right.