More light (excuse the pun) shed on the sleep / blue light issue

In the same way that excessive blue light hitting the brain during the darker hours before night can inhibit the release of the sleep-regulating hormone melatonin (and thus cause sleep problems), so can – during the daylight hours – not getting enough blue light cause a disruption of the night-time sleep cycle.

And a surprising way this can happen, for elderly people, is through the development of cataracts. Cataracts increase the opacity of the lens, and thus – during daylight hours – reduce the amount of blue light reaching the brain.

Solution? Have your cataracts done! Fascinating…