Bright Light on Fatigue in Women Being Treated for Breast Cancer

Inclusion Criteria:

- 21 years of age or older

- Newly diagnosed with stage I-III breast cancer

- Scheduled to receive 21-day cycles of intravenous chemotherapy

- Experiencing disrupted sleep (determined by Pittsburgh Sleep Quality Index)

- Morning or evening types (determined by Horne-Ostberg Morningness-Eveningness
Questionnaire (MEQ)

- Sighted

- Mentally competent to consent

- Able to under English

Exclusion Criteria:

- Concurrent malignancy

- Undergoing other cancer treatments

- Engage in shift work or travel across more than 3 time zones within 2 weeks prior to
study

- Known history of seasonal affective disorder or substance abuse

- Current diagnosis of major Axis I psychiatric disorders, neurological impairments, or
muscular dystrophies

- Regularly use steroid or other immunosuppressive medications

- Take prescribed sedative hypnotics or sleep medications because these conditions may
affect fatigue and/or sleep/wake patterns.

- Have eye conditions (glaucoma or retinal disease), problems triggered by bright light
(e.g. migraine), or take photosensitizing medications (e.g. some porphyrin drugs,
antipsychotics, antiarrhythmic agents)