This tutorial was made as an attempt to bring out the color in Amy's eyes in this picture. It was requested by 
frail_delusion. :D
to: 
Program: Photoshop CS2
Uses: Selective Coloring, Hue/Saturation, Curves,
Color Balance, and the Polygonal Lasso Tool
Add a Selective Color Adjustment Layer. (Layer > New Adjustment Layer > Selective Color)
Neutrals
Cyan: -12
Magenta: -15
Yellow: -8
Black: -16
Add a second Selective Color Adjustment Layer. (Layer > New Adjustment Layer > Selective Color)
Reds
Cyan: -25
Magenta: 0
Yellow: 0
Black: +50
Add a Hue/Saturation Adjustment Layer. (Layer > New Adjustment Layer > Hue/Saturation)
Hue: 0
Saturation: -10
Lightness: 0
Your image should now look something like this.
Make a copy of all of your layers so far (CTRL + A > SHIFT + CTRL + C) and set it to Soft light at 40%. Make sure this layer is on top of all the others.
Add a Curves Adjustment Layer. (Layers > New Adjustment Layer > Curves)
RGB
Input: 192
Output: 177
Add a Color Balance Adjustment Layer. (Layers > Adjustment Layer > Color Balance)
Midtones: -13 0 0
Shadows: 0 0 0
Highlights: 0 0 0
Your image should now look something like this.
Now for the tricky part...
The main goal of this tutorial was to bring out the color in Amy's eyes. The previous colorings helped, but didn't do everything I wanted them to do. So, I decided to add in these extra steps.
a) Create a new layer and fill it with #6a7867. Set this layer to Overlay at 100% and hide it. (To hide a layer, click the eye symbol next to the layer in the layers palette.)
b) Using your Polygonal Lasso Tool, trace around her left eye. When you're finished, a round selection should appear.
c) Now, unhide the layer we just created, Invert your selection (SHIFT + CTRL + I) and press DELETE on your keyboard.
d) Finally, duplicate that layer, this time setting it to Soft Light at 100%.
Repeat steps a through d for her right eye.
Your final product should now look like this.
I made this tutorial specifically for the featured image, so I'm not really sure how it will work when it's applied to others. Feel free to try it out, though. Also, since that last step is a bit tricky, I'm offering the .PSD up for download here. However, I do highly encourage you to attempt the tutorial. ;)
frail_delusion. :D to: Program: Photoshop CS2
Uses: Selective Coloring, Hue/Saturation, Curves,
Color Balance, and the Polygonal Lasso Tool
Add a Selective Color Adjustment Layer. (Layer > New Adjustment Layer > Selective Color)
Neutrals
Cyan: -12
Magenta: -15
Yellow: -8
Black: -16
Add a second Selective Color Adjustment Layer. (Layer > New Adjustment Layer > Selective Color)
Reds
Cyan: -25
Magenta: 0
Yellow: 0
Black: +50
Add a Hue/Saturation Adjustment Layer. (Layer > New Adjustment Layer > Hue/Saturation)
Hue: 0
Saturation: -10
Lightness: 0
Your image should now look something like this.
Make a copy of all of your layers so far (CTRL + A > SHIFT + CTRL + C) and set it to Soft light at 40%. Make sure this layer is on top of all the others.
Add a Curves Adjustment Layer. (Layers > New Adjustment Layer > Curves)
RGB
Input: 192
Output: 177
Add a Color Balance Adjustment Layer. (Layers > Adjustment Layer > Color Balance)
Midtones: -13 0 0
Shadows: 0 0 0
Highlights: 0 0 0
Your image should now look something like this.
Now for the tricky part...
The main goal of this tutorial was to bring out the color in Amy's eyes. The previous colorings helped, but didn't do everything I wanted them to do. So, I decided to add in these extra steps.
a) Create a new layer and fill it with #6a7867. Set this layer to Overlay at 100% and hide it. (To hide a layer, click the eye symbol next to the layer in the layers palette.)
b) Using your Polygonal Lasso Tool, trace around her left eye. When you're finished, a round selection should appear.
c) Now, unhide the layer we just created, Invert your selection (SHIFT + CTRL + I) and press DELETE on your keyboard.
d) Finally, duplicate that layer, this time setting it to Soft Light at 100%.
Repeat steps a through d for her right eye.
Your final product should now look like this.
I made this tutorial specifically for the featured image, so I'm not really sure how it will work when it's applied to others. Feel free to try it out, though. Also, since that last step is a bit tricky, I'm offering the .PSD up for download here. However, I do highly encourage you to attempt the tutorial. ;)