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Measuring How Quickly the Eye Focuses After Sustained Viewing of Close-up Images and Videos

RecruitingNAAges 18 Years - 35 YearsAllRochester Institute of Technology
NCT07679048 on ClinicalTrials.gov ↗
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In plain words

What the trial is, and whether it could suit you

In this experiment, subjects will view a cross pattern on the screen and be asked to focus their eyes on it. The cross pattern will look like it is moving towards and away from the eye in a back-and-forth motion. As the subjects focus their eyes on the shapes, the investigators will measure the focus of their eyes using a device called a wavefront sensor. This device uses infrared light to measure the optical properties of the eye in real time. Our goal is to find out how well the eye focuses before and after viewing images on a screen up close (25cm). Since many people spend a lot of time looking at a computer screen while at work or at school, it is important to understand how this affects the eye's ability to focus.

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📋 Eligibility rules (as published)
Inclusion Criteria: * Between 18-35 years of age * Normal or corrected-to-normal (glasses/contact lenses) vision. Exclusion Criteria: * Vision worse than 20/20 while wearing glasses / contact lenses. * Fragile or loose teeth (participants need to bite a piece of dental clay to stabilize their heads so that measurements can be taken from their eyes) * Current pregnancy (experiment requires sitting down without moving for stretches of time) * Heart disease * Personal/familial history of epilepsy
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What it tests

  • Near viewing first
  • Distant viewing first
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Where

1 site
Chester F. Carlson Center for Imaging Science
Rochester, United States
🤝 Taking part is your choice, and you can leave at any time. Only the trial team can confirm you are eligible — always decide together with your own doctor.
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