This is one of the first kinds of edits I learned how to do when I started using Photoshop Elements.

You open the original image and duplicate. You turn the image on layer 1 to black and white then the background layer (in color) is hidden behind the black and white one. You take your eraser and erase the eyes from layer 1(b&w layer) so the eyes from the bottom color layer show through. Flatten and save!

This is my own photo, taken by me and I do not have source links. Photo was enhanced for color/contrast and I ran unsharpmask to bring out the lines (original was a bit blurred). This is not stock so please do not use.