How light affects sleep and your body clock
Part of Brain & nervous system, Eyes & vision clinical trials.
This study looks at how your eyes react to light and how that relates to your sleep and body clock. By participating, you help researchers understand how light affects sleep and daily rhythms.
Summary written for real people, not researchers, by Clin2.
Who can take part
- You are between 18 and 85 years old.
- You are in generally stable health.
- You can speak, understand, and read English at a high school level.
- You have no history of eye injury or surgery (other than glasses or contacts).
- You are not taking medications that affect sleep, alertness, or pupil size.
- You have not done shift work or crossed more than 2 time zones in the past 3 months.
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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