Keep an eye on the details
With our area looking a lot tidier, we now need to make sure the skin tones are uniform. Create a Levels Adjustment Layer and set the blending mode to Screen. This should make the image very light. Now invert this Layer Mask by pressing Ctrl+I so that it is black. Using a small, soft-edged brush at 20% Opacity, paint white where you need the skin to appear a bit lighter (perfect if you’ve missed any areas). Once you’re happy with the results, create another Levels Layer and set it to Multiply. This will make everything look dark. Invert this again with Ctrl+I and use the same small, soft-edged white brush at 20% to paint anywhere that looks too light. Being precise and patient is the key here. It may work well to use this step to darken just under the eyes slightly, just to give them a little bit of natural-looking shadow. If you go over the eyes or make a mistake, instead of using Ctrl+Z, you can paint back using a black brush, which effectively erases the effect.