Are you blind with no light perception? Do you have problems sleeping or trouble with daytime sleepiness? Non-24-hour sleep wake disorder occurs in some individuals who are totally blind and lack the light sensitivity necessary to reset the "body clock". This can lead to problems with sleep and/or daytime excessive sleepiness. You can help researchers understand non-24-hour sleep wake disorder by taking a brief phone survey. In addition, you will have the opportunity to be informed of upcoming clinical studies recruiting in your area. Survey Participants Need to: be over 18 years of age be blind with no light perception have sleep problems and/or daytime sleepiness Collected information will be kept strictly confidential. For each completed survey, a donation of $25 up to $50,000 will be made to the Association of Blind Citizens. If you want to participate in the survey, please call toll-free 1-888-387-0986 Monday-Friday between 9:00 AM and 5:00 PM ET. Check out the TABI resource web page at http://acorange.home.comcast.net/TABI and please make suggestions for new material. if you'd like to unsubscribe you can do so through the freelists.org web interface, or by sending an email to the address tabi-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject.