How Accurate Do You Need To Be When Removing Red Eye?
Not very. That's right, when you're using the Red Eye tool (Shift-J until you have it), you can click directly on the red that appears in the pupil, but if you're afraid that you won't be able to click directly on the red area (which can happen due to squinting, eye lashes, etc.), don't sweat it. Just click somewhere near where the red eye appears, and it will still remove the red eye. The tool is sensitive enough to search out any red that's even near where you clicked, so that's why the answer to the question "how accurate do you need to be when clicking?" is "not very."