I wear my Blue Blocking Glasses for at least 2 hours before bedtime. I have noticed that I am sleeping better and seems to be dreaming more! In the morning I get up when it is still dark so I wear my Blockers until the sun starts to rise, this is so my eyes don't suddenly awaken to artificial lights on around the house. The glasses are comfortable to wear although I would like to know if the arms could be slightly tighter to the face. An extra bonus is that my Blockers fit over my reading glasses (although it looks weird). Overall a happy customer.