Why people with dementia and Alzheimer’s need more light

Poor sleep quality and falls are two of the main problems experienced by the elderly and people with dementia and Alzheimer’s.
Without adequate light, which research shows has a positive effect on the biological clock, disruption can occur in the sleep patterns of older adults and those with dementia and Alzheimer’s. This can cause confusion in daily routines and reduce alertness and activity, whilst increasing the frequency of daytime napping. Agitation, anxiety and depression can also be exacerbated.

Older people and people with dementia and Alzheimer’s need more light because, as we grow older and our eyes change and more light is needed to maintain visual, as well as non-visual functions.

The non-visual system

If the correct quantity and quality of light enters the retina, it can synchronise our circadian rhythms to the 24-hour light/dark cycle. This is known as the non-visual system and it requires more light for stimulation than the visual system. Circadian disruption occurs when light levels indoors are not high enough, or set to the correct colour temperature, to activate the circadian system.

Why biodynamic lighting

Biodynamic lighting can enhance the visual, perceptual and biological needs of older people and those with dementia and Alzheimer’s, helping them to remain independent at home for longer and significantly contributing towards a better quality of life.

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Find out more about why older people need more light >>