Originally Posted by
Tchiowa
Many people can't sleep with eyeshades. Uncomfortable. "The rest of us" as you refer to are a tiny minority.
There is some ambient light that allows you to see well enough to move around the cabin even with the lights off and the shades closed.
It's kind of like smoking. If you can find a way to have your shades open without negatively affecting the people around you, go ahead. If not, don't.
How many people have you met who can't sleep with eyeshades? (And have they confirmed that they are able to sleep in a dark cabin without eyeshades, at the same jetlag/tiredness levels?)
Not having natural light IME makes jetlag much worse if it's currently daytime, and you want to stay awake for jetlag management purposes.