Once the first eye looks good, put a selection around the other eye. The corrected eye still stays selected, but it’s sort of "less selected" than your new eye selection. As soon as you click-and-drag out the selection, this eye is fixed, too.
If the repair makes the eye look too gray, you can darken the eye by dragging the Darken slider to the right (see Figure 3). The Pupil Size and Darken sliders are live. As you drag, you see the results onscreen—you don’t have to drag a slider and then reapply the tool to see how it looks. If you make a mistake and want to start over, just click the Clear button on the far right side of the toolbar.