Evaluating How Well Different Types of Light-sensitive Cells in the Eye Contribute to Its Focusing Ability

Recruiting now · Not applicable

Conditions studied: Monochromatic, L- and S-cone Modulation Only, L- and M-cone Modulation Only, M and S-cone Modulation Only

In brief

In this experiment, subjects will view shapes on a screen with varying colors and be asked to focus their eyes on the shapes. The shapes will look as though they are jumping to random distances away from the eye. 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 on different colors. Our broad goal is to better understand how the eye focuses because that process is a major part of having clear and good vision.

Key facts

Study ID

NCT07691463

Run by

Rochester Institute of Technology

People needed

20

Starts

2026-07-02

Expected to finish

2026-12-15

Last updated by the study team

2026-07-17

Who can join

Age: any, up to 35. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Between 18-35 years of age
• Normal or corrected-to-normal (glasses/contact lenses) vision.

You may not qualify if…

• 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 is running

• Chester F. Carlson Center for Imaging Science — Rochester, New York, United States (enrolling)

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.