Many of us know what it’s like to have a headache. Depending on the cause, it can trigger sharp, dull, or throbbing pain. Headaches range in severity and can affect any part of your head.

One uncommon cause of headaches is eye strain.

This can happen when you focus on a task, like using a computer, for too long. It can also occur when your eyes try to focus in light that’s too bright or dim. Essentially, eye strain is when your eyes get tired due to overuse.

Eye strain is also associated with symptoms like:

If you have eye strain, it doesn’t mean your eyes are injured or damaged. Your headache and other symptoms should ease or go away completely once you rest your eyes.

Still, eye strain headaches can be frustrating and disruptive. They might make it difficult to focus on work, school, or other projects.

In this article, we’ll take a closer look at why eye strain causes headaches, how you can find relief, and ways to prevent these kinds of headaches from derailing your day.

There are many kinds of headaches. The most common types include:

These headaches require different treatment and care than an eye strain headache. That’s why it’s important to know how to recognize an eye strain headache, which is mild when compared with other headache types.

When you look at objects or screens at a close range, the muscles in and around your eyes need to work harder to focus. Over time, these muscles can get sore and tired, just like any other muscle in your body.

Similarly, squinting for a long period of time may trigger spasms in your facial muscles and the muscles around your eyes. These spasms can lead to eye strain headaches.

To identify the cause of your eye strain headache, consider what you were doing before your symptoms developed. This will help you determine how to reduce discomfort.

Let’s take a closer look at some of the most common causes of eye strain headaches.

Prolonged use of digital screens

Looking at a digital screen for a long time is the most common cause of eye strain. In this case, the condition is called digital eye strain or computer vision syndrome.

When you focus on a screen, you tend to blink less often. This can lead to dry eyes, which may cause irritation.

The following scenarios might also worsen digital eye strain:

  • excessive glare or reflection on your screen
  • low contrast between the screen text and background
  • digital screens placed at incorrect distances
  • poor posture

You’re more likely to develop digital eye strain if you look at a screen for 2 or more hours without taking a break.

Prolonged focus on a single task

It’s possible to develop eye strain without using a digital screen. Your eyes can get tired after continual focus on a single activity for a long time. These include:

  • long-distance driving
  • reading a book
  • working on a project, like sewing or drawing

Vision problems

Uncorrected vision can also cause eye strain. You might need prescription glasses or contact lenses to help you see things clearly. If you already wear them, you may need a different prescription.

If your vision is uncorrected, your eyes will need to work harder to try and form a clear image. This can make your eyes tired and lead to eye strain headaches.

Bright or dim lights

It’s difficult to see clearly in light that’s too bright or too dim. You might need to squint your eyes to see.

You may have experienced this while driving a car on a sunny day without sunglasses, or walking into a dark room. As your eyes try to focus, they can become tired and strained.

You can reduce your chances of getting these kinds of headaches by taking some simple steps. Here’s what you can do.

In addition to modifying your habits, you can also relieve eye strain headaches at home by taking the following steps.

  • Wear prescription glasses. Using reading or computer glasses may provide relief. If you have glasses to correct your vision, be sure to use your most recent prescription.
  • Close your eyes. Simply resting your eyes for several minutes can ease your symptoms.
  • Use artificial tears. Dryness can make your eye strain worse. Using artificial tears may help moisten your eyes and offer relief.
  • Take an NSAID. If you have a stubborn eye strain headache, an over-the-counter nonsteroidal anti-inflammatory drug (NSAID) may help.

Often, simply making lifestyle changes — like those suggested in this article — can reduce the occurrence of your eye strain headaches.

Visit a doctor if your headaches persist even after making these changes. You should also see a doctor if you have these symptoms along with your headaches:

Be sure to get regular eye exams, even if you have good vision. Your eye doctor can check for other problems like eye muscle imbalance.

When your eyes work too hard, your eye muscles may contract too much. These contractions can trigger an eye strain headache. Often, these headaches cause pain and discomfort behind your eyes.

You may develop an eye strain headache after focusing on a task for too long. Fortunately, you can usually find relief just by letting your eyes rest. It also helps to wear glasses or contact lenses that are the correct prescription.

If lifestyle changes don’t help, visit a doctor. They can determine whether an underlying condition is causing your headaches.