Screen time and eye focus: new study measures the impact of Close-Up viewing
NCT ID NCT07679048
First seen Jul 01, 2026 · Last updated Jul 09, 2026 · Updated 3 times
Summary
This study investigates how the eye's focusing ability changes after 20 minutes of looking at a screen up close (25 cm) compared to looking at a distant object (10 m). Healthy adults aged 18-35 will perform focusing tasks while a wavefront sensor measures their eye's response. The goal is to understand the effects of prolonged near viewing, which is common in modern work and school environments.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- What this could lead to
- If successful, this could help understand why some people experience eye strain or blurry vision after long screen use.
- What could go wrong
- This is a small, early-stage observational study with only 20 healthy adults, so results may not apply to everyone or lead to direct treatments.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Chester F. Carlson Center for Imaging Science
RECRUITINGRochester, New York, 14623, United States