Black Moor fish with white eyes?

I have a Black Moor goldfish which I got about a week ago. He's been fine in a 10- gallon tank, and has always had black eyes. Today I noticed both of his eyes are white. He's kind of lethargic, laying on the bottom of the tank; and when he does swim around he's constantly bumping into the indsides of... show more I have a Black Moor goldfish which I got about a week ago. He's been fine in a 10- gallon tank, and has always had black eyes. Today I noticed both of his eyes are white. He's kind of lethargic, laying on the bottom of the tank; and when he does swim around he's constantly bumping into the indsides of the fish tank.

I've searched a bit, and found that Moor fish generally have bad eye sight, but why are both of his eyes completely white?

Thank you for your time reading this, and thank you for your help.
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