This is another one of those 30-second miracles for enhancing the eyes. This technique makes the eyes seem to sparkle by accentuating the catch lights, and generally draws attention to the eyes by making them look sharp and crisp (crisp in the “sharp and clean” sense, not crisp in the “I-burned-my-retina-while-looking-at-the-sun” sense).
Open the photo that you want to retouch. Make a duplicate of the Background layer by going under the Layer menu, under New, and choosing Layer via Copy (or pressing Ctrl-J [Mac: Command-J]), which creates a new layer named “Layer 1.” Note: Press the Z key to switch to the Zoom tool and zoom in if needed.
Go under the Enhance menu and choose Unsharp ...