Hi Glowskull and welcome to the board.
I have never come across a case of both eyes bloodied before, but I suspect it is probably physical trauma: the fish may either been attacked by other fish or banged its face hard on something in the pond.
Is the fish eating and swimming normally? Does it seem to be blind or can it see, and are the eyes protruding or misshapen in any way? Are there any other symptoms at all?