How to Reduce Eye Strain If You Spend Hours Looking at Screens

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How to Reduce Eye Strain If You Spend Hours Looking at Screens

If your eyes feel tired, dry, or irritated by mid-afternoon, you are far from alone. Screen-related eye strain — sometimes called digital eye strain or computer vision syndrome — is one of the most common complaints among people who work at desks or spend significant time on phones and laptops. While it is rarely a sign of serious damage, it can significantly affect your comfort and concentration. The good news is that most of the causes are highly manageable.

What Is Actually Happening to Your Eyes

When you focus on a screen, your eyes perform thousands of tiny, precise adjustments to maintain that focus. You also blink far less frequently than normal — roughly half as often — which means the surface of your eye dries out faster than it can be refreshed. Combined with screen brightness, blue light, and poor posture, this sustained effort leads to the familiar heaviness, soreness, and blurred vision many screen users experience.

The 20-20-20 Rule

One of the most consistently recommended strategies is the 20-20-20 rule: every 20 minutes, look at something at least 20 feet away for at least 20 seconds. This briefly releases the focusing muscles in your eyes and allows them to relax. It sounds simple, but very few people actually do it without a reminder. Setting a recurring alarm or using a browser extension can help establish the habit.

Practical Changes That Make a Difference

• Adjust your screen brightness: Your screen should be roughly as bright as the environment around it. If your screen looks like a light source compared to your surroundings, it is too bright.
• Increase font size: Squinting to read small text is a major contributor to eye fatigue. Zoom in or increase your default font size — there is no award for reading at 10pt.
• Position your screen correctly: The centre of your screen should be slightly below eye level, and it should be roughly an arm’s length away. Too close forces your eyes to work harder.
• Reduce glare: Position screens so that windows or overhead lights are not reflecting directly off them. A matte screen protector can also help.
• Blink deliberately: Remind yourself to blink fully and regularly, especially when concentrating.
• Use night mode or warmer screen tones in the evening: This reduces the intensity of blue-wavelength light in the hours before sleep, which can help with both eye comfort and your ability to wind down.

When to See a Professional

Eye strain that persists after making these adjustments, vision changes, persistent headaches, or significant dry eye symptoms are all reasons to book an appointment with an optometrist. They can check whether an updated prescription, specialist lenses, or lubricating eye drops would help. If you have not had an eye test in the last two years, that is also a good starting point. Consult your GP if you have concerns about your eye health or any new or worsening vision symptoms.