Light therapy' is established worldwide as the treatment of choice for seasonal affective disorder. It is also successfuly used in nonseasonal depression, as well as for many other psychiatric and neurologic illnesses, and in sleep medicine. ‘Wake therapy’ is the fastest antidepressant known. Imaging studies show that both methods share neurobiological substrates with antidepressants, but act much faster. 'Chronotherapeutics' – the combination of light and wake therapy –...
