What your eyes do when you focus after looking at close-up images
Official title: A Randomized, Repeated-measures Study to Measure the Temporal Frequency Response of Ocular Accommodation After Sustained Near Viewing.
Run by Rochester Institute of Technology · NCT07679048 · Data updated 2026-11-12
The study tests how quickly and accurately the eye focuses before and after looking at a computer screen up close in young adults.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 35 Years |
| Sex | All |
| Enrollment | 20 (estimated) |
| Sponsor | Rochester Institute of Technology Academic / other |
| Locations | 1 site (Rochester, New York) |
| Status | Recruiting |
| Started | June 25, 2026 |
| Main results expected | December 15, 2026 |
| Study ends | December 15, 2026 |
| Registry record updated | July 8, 2026 |
| Trial ID | NCT07679048 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults aged 18-35 with normal or corrected-to-normal vision.
✕Probably not a fit
People with vision worse than 20/20 with correction, or conditions prohibiting stable head positioning, may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
Participants will view a moving Maltese cross while the display changes distance in a controlled way, and eye focus will be measured in real time with a Shack-Hartmann wavefront sensor. The test compares accommodative responses before and after sustained near viewing (25 cm) to see how close-up viewing affects focusing ability. The study uses a Badal relay to adjust image depth while tracking the eye’s optical properties. Normal or corrected-to-normal vision adults aged 18-35 are eligible, and measurements are performed while the head is stabilized. The goal is to better understand short-term changes in accommodation related to near tasks like computer work.
Why it matters
Potential benefit: If successful, the findings could inform guidelines for near-work tasks and eye care to maintain comfortable and accurate focusing.
How similar studies have gone: Prior research has used wavefront sensing to study accommodation, but this specific pre/post near-view protocol is a targeted investigation.
Who can join: the full rules
Show full inclusion / exclusion criteria
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
Where it's running
-
Chester F. Carlson Center for Imaging Science
Rochester, New York, United States Recruiting
Study contacts
- Principal investigator: Benjamin M Chin, Doctorate — Rochester Institute of Technology
- Study coordinator: Benjamin M Chin, Doctorate
- Email: bmccis@rit.edu
- Phone: 8454534320
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Longitudinal Visual Diet in Children
This study follows children ages 7–12 to see how everyday visual factors like distance, light, and viewing patterns relate to myopia development over time.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.