Light therapy device helps improve some symptoms of dementia

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Exposure to bright daytime light may help relieve symptoms of dementia

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Daytime exposure to bright light may help improve sleep and relieve some dementia symptoms in older people by strengthening their circadian rhythms. These 24-hour biological cycles enable our bodies to switch tasks and recuperate by synchronising specific activities, including sleep, with day and night.

As we age, the lenses of our eyes grow cloudier, meaning less light reaches photoreceptive cells in the retina that connect to the body’s master clock in the brain, called the suprachiasmatic nucleus. That can be problematic, as daylight helps keep our biological …

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