Why do I see red when I close my eyes in the sun?
Matthew Barrera
Updated on May 20, 2026
The first one is if you shut your eyes in the daytime, in a bright room or outside. Some light does go through your closed eyelids. So you might see a dark reddish colour because the lids have lots of blood vessels in them and this is the light taking on the colour of the blood it passes through.