A Light Exposure Tracker Designed to Improve Circadian Rhythms - Aim 1

Light Exposure Tracker in Alzheimer's Disease.

The purpose of this research study is to investigate the relationship between reminder messages sent via text and compliance with a daily morning light intervention designed to advance the circadian clock. Twenty healthy adults will be recruited to participate in a randomized, cross-over study where daily messages are, or are not, provided to remind participants to carry out the intervention.

Inclusion Criteria:

• healthy adults over the age of 55
• score of 25 or greater on MoCA

Exclusion Criteria:

• Severe sleep apnea
• restless leg syndrome
• obstructing cataracts
• macular degeneration
• diabetic retinopathy
• glaucoma
• use of sleep medications
• brain disease