Pupil light reflex test in delayed sleep phase disorder
Part of Brain & nervous system, Mental health clinical trials.
This study uses a simple camera test (pupillometry) to measure how your pupils react to light, which may help understand delayed sleep-wake phase disorder. It could be a way to better diagnose or treat this condition.
Summary written for real people, not researchers, by Clin2.
Who can take part
- You have been diagnosed with delayed sleep-wake phase disorder (your sleep time is naturally much later than most people's).
- You are not taking any medications that affect pupil size, such as some antidepressants or eye drops.
- You have no history of eye disease or eye surgery.
- You do not have an unstable medical or psychiatric condition.
- You do not work night shifts or have a very irregular sleep schedule that is not part of your sleep disorder.
- You consume less than 400 mg of caffeine per day (about 4 cups of coffee).
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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