They help me sleep better. My husband prefers to have the curtains open and I prefer them shut and don't like being woken early by the light. A blindfold is a compromise. I don't like the kind pictured above though as I find the elastic a bit uncomfortable. I just use a scarf knotted loosely behind my head.
Funny you should ask!
I keep one Always like the pic, in my handbag.
Well on the odd times I have been quite sick, and had to be rushed to hospital...drip put in my arm, in a bed....hospital staff (not so quite of course)...in Emergency.I can put the mask on, and also I carry ear plugs...and try to block out all that light and noise.
So if I eliminate, two big factors....I can try to manage the pain, or compliant.
I love them. I have heaps of them. I have never had to buy them, & I've been wearing them every night, for years & years!!! The 1 in the photo looks like a Qantas 1. I also don't sleep well on flights. They don't help me to sleep on flights, but I'll still use them on a flight. At home I just pull it up, to check the clock when I wake in the middle of the night.