👁️ Do Large Screens Cause More Eye Strain? Experts Debunk the Myth

Ophthalmologist explains why screen size is not the main cause of digital eye fatigue

As people spend more time on smartphones, computers, and TVs, concerns about eye health continue to grow. But do large screens really cause more eye strain?

According to specialists, the answer goes against common belief. The main issue is not screen size, but how screens are used.

According to ophthalmologist Kenzo Hokazono, professor at Pontifícia Universidade Católica do Paraná, larger screens can actually help reduce visual effort.

“Large screens do not cause more eye strain. What causes more discomfort is small text. That’s why smaller screens can be more tiring than larger ones,” the specialist explains.

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🔍 Visual Effort Is the Main Factor

Eye strain is primarily linked to continuous near-vision effort. This happens due to constant contraction of the ciliary muscle, which controls focus on nearby objects.

The longer people read or work on screens without breaks, the greater the strain on this muscle.

Other factors also contribute to discomfort, including:

• poor lighting;
• screen glare;
• excessive contrast;
• very dark environments.

Experts recommend using soft ambient lighting positioned behind the user to reduce reflections.

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📏 Proper Distance and Posture Matter

Maintaining the correct distance between your eyes and the screen is essential to reduce visual fatigue. Ideally, screens should be positioned about 30 to 40 centimeters away.

Good posture also plays an important role:

• straight back;
• aligned neck;
• screen at eye level.

These habits help prevent not only eye strain but also muscle pain.

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💧 Dry Eyes Are a Common Symptom

Another frequent issue associated with prolonged screen use is dry eyes. When focusing on screens, people tend to blink less, which may cause:

• burning sensations;
• itching;
• blurred vision;
• gritty feeling.

Consciously blinking and, when recommended, using lubricating eye drops can help relieve symptoms.

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⏱️ The 20-20-20 Rule Helps Protect Your Vision

Dr. Hokazono also highlights the importance of the well-known 20-20-20 rule for people who spend long hours in front of screens.

The guideline is simple:

• every 20 minutes,
• look at something 20 feet away (about 6 meters),
• for 20 seconds.

This habit helps relax the focusing muscles and reduces continuous eye strain.

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🩺 Regular Eye Checkups Are Essential

Finally, specialists emphasize the importance of keeping prescriptions up to date and having regular eye exams.

Routine checkups help:

• correct vision problems;
• prevent eye diseases;
• detect silent systemic conditions early.

Taking care of your eyes is increasingly important in today’s digital lifestyle.