Читать книгу Sleep: The secret to sleeping well and waking refreshed - Prof. Idzikowski Chris - Страница 81

Blind or visually impaired people have no internal bodyclocks because their retinas are so damaged that light cannot enter the brain. They will therefore have no natural sense of when to get up and when to go to bed.

In recent years, street and industrial lighting has increased dramatically, which has had a great impact on normal daylight hours and in some people can have the effect of disturbing the timing of their internal clocks. Again, an eye mask, thick curtains, or curtains with extra lining may help.