This study is creating a registry (a collection of information) about blind individuals who experience sleep problems, especially Non-24-hour sleep-wake disorder (Non-24). Non-24 is a condition where totally blind people have abnormal sleep at night and feel sleepy during the day. The study aims to better understand these sleep issues, look into possible treatments, and help recruit for future studies. You can join if you are blind and have a self-described problem with sleep or daytime sleepiness. The study collects information through a phone or web survey about your vision and sleep. The main goal is to gather information from many blind participants to learn more about these sleep conditions.

Study design

This is an observational study aiming to enroll 10,000 participants. It is not testing a specific treatment but rather collecting information.

What's involved

You would participate by completing a phone or web survey about your vision and sleep problems.

Compensation

Not stated in the trial record.

Follow-up

The primary endpoint, the number of blind participants, is measured on an ongoing basis, but specific follow-up duration is not mentioned.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.