Home › Blindness › NCT01195558

Patient Registry of Blind Subjects With Sleep-related Problems

Development of a Patient Registry of Blind Subjects With Sleep-related Problems

Who can join

All ages · All sexes

Inclusion Criteria:

1. Subjects or legal guardians must be at least 18 years of age to participate in the telephone survey. Parents or legal guardians may represent children from 0 through 17 years who meet the following criteria.
2. Subjects must be blind.
3. Subjects must have some self-described problem with sleep or daytime sleepiness.

About the study

Non-24-hour sleep-wake disorder (Non-24) is a condition experienced primarily by totally blind individuals that results in abnormal night sleep patterns and chronic daytime sleepiness. This is a research protocol to develop a patient registry of subjects who may suffer from Non-24 and who are blind. Subjects participate in the study through a phone survey. This registry will be used to better understand, sleep related problems in blind individuals, including the investigation of a potential treatment, recruitment for future clinical studies, and to provide a forum for raising awareness about Non-24. The survey consists of questions regarding the degree of vision impairment and sleep problems that the subjects may be experiencing.

What is being tested

• Data collection on blindness and sleep problems (other)

Sponsor: Vanda Pharmaceuticals · Participants: 10,000 · Started: 2010-04

Contact the study team

• Vanda Pharmaceuticals · Phone: (202) 734-3400

Official record on ClinicalTrials.gov — NCT01195558

Locations in the U.S.

Conditions

• Blindness

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.