Screen time may cause a small, temporary rise in intraocular pressure (the fluid pressure inside your eye) in some people, but evidence is limited and does not show that everyday screen use causes lasting high eye pressure or glaucoma. A 2025 review of nine studies found increases at some time points, especially among people with glaucoma, with readings generally returning toward baseline after screen exposure.
What does research say about screen time and eye pressure?
Research suggests that looking at digital screens for a sustained period can temporarily change intraocular pressure (IOP), but the effect is not consistent across all people or measurement times. The strongest available evidence supports a possible short-term change rather than a proven link between everyday screen use and persistently high eye pressure.
A 2025 systematic review published in Graefe's Archive for Clinical and Experimental Ophthalmology and indexed by the U.S. National Library of Medicine examined nine studies involving 675 eyes. In healthy participants, the researchers found an average pressure increase of about 1.5 mmHg at one measurement point during screen exposure. Among participants with glaucoma, increases of about 1.1 mmHg and 2.5 mmHg were reported at two measurement points. Other time points did not show significant changes, and pressure generally returned to its starting level after screen exposure.
These findings suggest that screen use may temporarily affect eye pressure in some circumstances, particularly in people who already have glaucoma. However, the evidence remains limited because the review included only nine studies. Larger, well-designed studies are needed to establish how consistently these changes occur, why they happen, and whether they have meaningful effects on long-term eye health.
How is eye pressure different from digital eye strain?
Eye pressure is the pressure of the fluid inside the eye. Your eyes continuously produce a clear fluid called aqueous humor, which normally drains through small channels near the front of the eye. When fluid production and drainage are not balanced, the pressure inside the eye can rise. Persistently elevated pressure can increase the risk of damage to the optic nerve.
Digital eye strain is different. It refers to discomfort associated with prolonged use of computers, phones, tablets, and other screens. According to the Cleveland Clinic, prolonged screen use can contribute to dry eyes, blurred vision, irritation, headaches, and discomfort around or behind the eyes. People often blink less while concentrating on a screen, which can make the eye surface drier.
Because these problems can feel similar, eye fatigue or a sensation of pressure behind the eyes does not tell you whether your intraocular pressure has increased. Digital eye strain is mainly a problem of visual discomfort, whereas intraocular pressure is a measurement of the fluid pressure inside the eye. They can occur around the same time without being the same condition.
Does prolonged screen use cause glaucoma?
There is currently insufficient evidence to conclude that ordinary screen use causes glaucoma or permanently raises eye pressure. A temporary pressure change during a screen task does not, by itself, establish that the eye has sustained damage or that a person will develop glaucoma.
According to the National Eye Institute, elevated eye pressure is an important risk factor for glaucoma because it can damage the optic nerve. However, not everyone with high eye pressure develops glaucoma, and some people develop glaucoma even when their pressure readings are within the usual range. Eye pressure is therefore only one part of assessing glaucoma risk.
For someone who already has glaucoma or ocular hypertension, a brief pressure rise during screen use may be worth discussing with an eye specialist. The available evidence does not establish that everyone with these conditions needs to avoid screens. Instead, follow the monitoring and treatment plan recommended for your eyes.
Why can eye pressure change throughout the day?
Eye pressure is not necessarily the same at every moment. It can vary naturally during the day, and a single measurement may not capture every fluctuation. This makes it important to interpret pressure readings in context rather than assuming that a temporary difference is caused entirely by screen use.
Moorfields Eye Hospital explains that pressure can vary during the day and that repeated measurements may be useful when an ophthalmologist needs to understand a person's pressure pattern. If a reading is unexpectedly high, an eye specialist may consider the timing of the measurement, previous readings, examination findings, and other glaucoma risk factors.
For this reason, a study showing a short-term change during screen exposure should not be interpreted as proof that spending several hours on a computer will leave your eye pressure elevated. The duration, consistency, and clinical importance of any screen-related changes still require further study.
How can you use screens more comfortably?
You do not need to stop using computers or phones simply because you are concerned about eye pressure. Practical changes can help reduce digital eye strain, although they have not been established as a way to prevent or treat elevated intraocular pressure.
- Take regular breaks. Try the 20-20-20 approach: every 20 minutes, look at an object about 20 feet away for 20 seconds.
- Blink regularly. Make a conscious effort to blink fully while reading or working on a screen to help keep the eye surface moist.
- Adjust your screen position. Use a comfortable viewing distance and place the display slightly below eye level if that helps reduce eye and neck strain.
- Reduce glare. Adjust room lighting and screen brightness so you can read without squinting or straining.
- Make text easy to read. Increase the font size and use comfortable contrast rather than leaning forward to see small text.
- Address persistent dryness. If dry or irritated eyes continue, an eye care professional can help determine whether lubricating eye drops or another approach is appropriate.
These measures are intended to improve comfort and reduce visual fatigue. They should not replace pressure checks or prescribed treatment if you have glaucoma or ocular hypertension. There is also no established screen-time limit that guarantees eye pressure will remain normal.
When should you have your eye pressure checked?
Consider arranging an eye examination if you have persistent eye discomfort, recurring blurred vision, unexplained changes in vision, or symptoms that continue despite taking screen breaks. An examination can help determine whether the problem relates to dry eyes, a vision correction issue, or another eye condition.
An eye care professional can measure intraocular pressure using a test called tonometry. Depending on your medical history and findings, the examination may also include an assessment of the optic nerve, visual field testing, or other tests for glaucoma. People with previously elevated pressure, known glaucoma, or a family history of glaucoma should follow the eye examination schedule recommended for their individual risk.
Seek emergency medical assessment if you develop sudden, intense eye pain, particularly with a red eye, blurred vision, or nausea. The National Eye Institute identifies these as possible warning signs of acute angle-closure glaucoma, which requires urgent treatment. Do not assume that sudden or significant eye symptoms are simply caused by spending too long looking at a screen.
What is the main takeaway?
Screen time may cause temporary changes in eye pressure, but current evidence does not establish that regular screen use causes persistent high pressure or glaucoma. Screen-related dryness, eye fatigue, and blurred vision are more clearly recognized effects of prolonged screen use. Taking breaks can improve comfort, while appropriate eye examinations remain important for detecting elevated pressure and assessing glaucoma risk.