Step 2: Create a new layer, and change the colour in the colour palette to whichever colour you want the eyes to be.
Step 3: Zoom into the eye area and select the brush tool. Customize the brush size and make it into a suitable size, and colour in the eye pupils. Use the eraser tool to erase out any portions of colour that go beyond the pupil.
Step 4: Then, change the blend mode to either Hardlight, Overlay, Screen, Multiply or Darken. Each blend mode will give a different result in most cases. Reduce the opacity a little bit to give it a more realistic look.
That's it! You're done :)
Here are some examples-
ORIGINAL IMAGE
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EDITED - 1 (BLEND MODE - OVERLAY)
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EDITED - 2 (BLEND MODE - MULTIPLY)
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EDITED - 3 (BLEND MODE - SCREEN)
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(Tip: Use Screen ONLY if you want alien-y sort of eyes)
