It seems like a sleep mask will either cause the same kind of problem as the blankets, or be ineffective. (And I like my blankets!)

Also, I often actually do want to sleep late without the sun interfering - going to bed at 4:00 AM and rising with the sun doesn't sound pleasant. What I'd really need a bright light on a timer or something; if I actually cared, I could probably get my father to rig something up for me.