When red eye is the problem, the red eye tool works well, but when the flash has resulted in blue eyes, I have more of a problem corrected.
I usually wind up using the stamp tool to copy darker areas.
It has been suggested to me before to use the replace color adjustment, but this doesn't limit to the area of the eyes I have selected, but highlights areas all over the image.
Also if I use the wand tool and paint or bucket another color the effect is not smooth as with the red eye tool.
This is CS6