| Participants |
Inclusion criteria:
diagnosis of amnestic mild cognitive impairment or mild Alzheimer's disease, as defined by a MoCA score 17–24 and those who fall between 0.5–4.0 and 4.5–9.0 in the Clinical Dementia Rating Scale Sum of Boxes instrument sleep disturbance indicated by PSQI score > 5 on the PSQI and sleep efficiency < 80% as indicated via actigraphy resides in their own home, independent living, or assisted living facilities with a carer
Exclusion criteria:
diagnosed with another brain disease that fully explains the dementia (extensive brain vascular disease, Parkinson's disease, dementia with Lewy bodies, traumatic brain injury, or multiple sclerosis) resides in a skilled nursing facility or long‐term care recent changes in psychotropics (14 days) major organ failure (e.g. kidney failure) uncontrolled generalised disorders such as hypertension or diabetes obstructing cataracts, macular degeneration, or blindness has undergone cataract surgery and received an intraocular lens coated with ultraviolet‐ and blue‐blocking filters (400–440/440–500 nm) diagnosed with severe sleep apnoea; using the Sleep Apnea scale of the Sleep Disorders Questionnaire (score of 29 as a cutoff for men and 26 for women) diagnosed with restless leg syndrome using the International Restless Legs Scale, (cutoff off ≥ 11 as a positive screen) history of severe photosensitivity dermatitis, severe progressive retinal disease (e.g. macular degeneration), or a permanently dilated pupil (e.g. after certain types of cataract surgery)
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