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Measuring How Quickly the Eye Focuses After Sustained Viewing of Close-up Images and Videos
Sponsor: Rochester Institute of Technology
Summary
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, we 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.
Official title: A Randomized, Repeated-measures Study to Measure the Temporal Frequency Response of Ocular Accommodation After Sustained Near Viewing.
Key Details
Gender
All
Age Range
Any - 35 Years
Study Type
INTERVENTIONAL
Enrollment
20
Start Date
2026-06-25
Completion Date
2026-12-15
Last Updated
2026-07-01
Healthy Volunteers
Yes
Conditions
Interventions
Near viewing first
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks. One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes. In one intervention, the session is structured such that the screen is viewed first ('near viewing first').
Distant viewing first
In a given session of the experiment (1.5 hours), participants do 2 sets of accommodation tasks. One task happens after viewing a screen for 20 minutes at 25cm, and the other task happens after looking at a distant object (10m) for 20 minutes. In one intervention, the session is structured such that the distant object is viewed first ('distant viewing first').
Locations (1)
Chester F. Carlson Center for Imaging Science
Rochester, New York, United States