1.)Ok to start, get an image that you want to change the eye color of. I chose this.

2.) Now use your circular marquee tool and make a circle around the eye. Try to make it as perfect as possible, but if you make it bigger, thats ok, we have the eraser for later. Your image should now look like this.

3.) Now right click inside your circular selection, and select layer via copy.

4.) Now make the color you want your foreground color, make sure your circle is still selected and it is on the new layer from step 3, and goto edit>Fill.

Fill in the tiny circle with the color you chose at 100% opacity. Your image should look similar to this.

5.) Now, select the layer with the filled circle and set the blending mode to overlay.

6.) Your picture should now look like this, but with whatever color you chose.
Now your done! Touch up your image, add effects, different colors...I did this.
!!!~For other use, use the hue/saturation, and bring down the saturation to blend in the color with the orignal eye color better...~!!! Interested in showing us your graphix, or you need help, Register now.