[header] How to change eye color in photoshop [title] Find your subject and load it into photoshop. [step] This could be a simple copy and paste from your browser or opening the file and editing it there. [title] Use the circular marquee tool to generally select the iris area. 
[step] Use shift + the marquee tool to add another selection without losing the first one. [title] Press' q' to enter quick mask mode.