I suffer from the most severe dry eye condition... apparently my eye lids do not close all the way while I slumber. The pain in the morning is indescribable. I tried sleep masks as per my ophthalmologist's suggestion, but they were uncomfortable. Finding this mask was a God send, the eye cavities make a HUGE difference. Since my eyes flutter when I sleep, I still get protection from air exposure since my eyes are still covered by the mask. Ive had the mask for 3 weeks now and I havent had a nightmarish wake up since... Highly recommend!