Improvement of Sleep Disorders in Patients With Alzheimer's Disease After Sunlight Exposure Therapy.

Inclusion Criteria: 1. Diagnosed with Alzheimer's disease 2. CDR: 0.5 - 1 point 3. Conscious and able to cooperate with behavioral interventions and telephone interviews 4. Complaints of sleep disturbances, including: daytime sleepiness, difficulty falling asleep, fragmented sleep, nighttime awakening, nocturnal wandering, and sunset syndrome. 5. A cohabiting family member is required as the primary caregiver, who understands and cooperates with this intervention and has signed a consent form. 6. If the patient is already taking sleeping pills, the maintenance dose will not be adjusted. Exclusion Criteria: 1. Individuals with other brain injury conditions, such as cerebral palsy, brain tumors, traumatic brain injury, or stroke. 2. Individuals with visual impairments (assessed by comparing numbers with fingers at a distance of 30 cm upon admission). 3. Institutional residents. 4. Individuals living alone. 5. Individuals unable to cooperate with behavioral interventions and telephone interviews.