Note to self: order one of these for Peter

[dianeduane]

I have no trouble going to sleep in lighted places if I'm tired enough, but for best results, P. needs it dark This looks like a useful answer:  a Lights Out Sleep Mask. "It blocks out stray lightbeams that leak through those crappy free masks; it has an adjustable velcro strap; and the molded eyecups give your eyeballs freedom to flip around in REM sleep."

Sounds good. (Thanks to Gridskipper for the link.)