Wearing an eye mask during sleep improves episodic learning and alertness
But wearing an eye mask is nigh impossible for restless sleepers; it slips off constantly. My best solution after trying many masks is an old t-shirt draped across my eyes, which inevitably slips off but at least doesn't drag elastic bands over my face.Anyone know of research showing the effectiveness of varying levels of darkness in a room, from complete blackout to fairly dim?