Evaluating How Well Different Types of Light-sensitive Cells in the Eye Contribute to Its Focusing Ability
This study is looking at how different colors affect your eye's ability to focus. You would view shapes on a screen that change color, and your eye's focusing ability will be measured using a special device called a wavefront sensor. The colors used are grayscale, L and S cone modulation only, and L and M cone modulation only. The study aims to understand how your eye focuses on different colors, which is important for clear vision. To join, you need to be between 18 and 35 years old with normal or corrected-to-normal vision (20/20 or better with glasses/contacts). The study is currently unclear on its recruitment status.
- Study design
- This is an interventional study planning to enroll 20 participants. It is not specified if it is randomized or blinded.
- What's involved
- You would participate in two sessions, each lasting about 1 hour, on separate days. You will need to bite a piece of dental clay to stabilize your head during measurements.
- Compensation
- Not stated in the trial record.
- Follow-up
- Measurements are taken during the two 1-hour sessions, with no follow-up specified after the second session.
AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.
Evaluating How Well Different Types of Light-sensitive Cells in the Eye Contribute to Its Focusing Ability
At a glance
Conditions
Where it's being run
1 sites across 1 statesWho to contact
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What this trial measures
- Accuracy of ocular accommodationBecause this is a basic science experiment, each measurement takes place at the same time as the intervention. There will be two sessions, each lasting approximately 1 hour, on separate days (day 1 and day 2).
Ocular accommodation is the focusing response of the lens in the eye. When the stimulus viewed by the participant changes in distance, the eye automatically refocuses. The investigators measure this refocusing using a device called a wavefront sensor. The investigators are particularly interested in how accurate this refocusing is, which is measured in units of diopters.
- Speed of ocular accommodationBecause this is a basic science experiment, each measurement takes place at the same time as the intervention. There will be two sessions, each lasting approximately 1 hour, on separate days (day 1 and day 2).
The investigators are interested in how quickly the eye refocuses when a near object moves farther away. Typically, this process takes around 1 second, but it can take longer or shorter depending on the individual and on the object being viewed. By analyzing data collected by the wavefront sensor, the investigators will calculate how long it took for the eye to refocus during each measurement.