Phototherapy for Advanced Sleep-Wake Phase Disorder (ASWPD) and Delayed Sleep-Wake Phase Disorder (DSWPD)
If you find yourself falling asleep much later than the conventional bedtime, you may suffer from Delayed Sleep Phase Syndrome (DSWPD). This disorder occurs when your sleep is delayed by two or more hours beyond the socially acceptable or conventional bedtime. The opposite of this disorder is Advanced Sleep-Wake Phase Disorder (ASWPD) which is characterized …