Whiter eyes produced in Photoshop

Finally I found an example that I can show you. I was testing my camera's remote control and various tripod setups. Here's the original photo, with a surprised look on my face.

Before brightening eyes

Then using Photoshop CC: The Missing Manual, I used the recommended technique to select the eyes, copy them onto their own adjustment layer with a black mask, change the blend mode to Screen, and finally paint in a brighter iris and area. The result is below.

Now we have brighter eyes and irises

As always, with an adjustment layer, you can decrease the effect by reducing opacity of the eyes-only layer. You've got to admit, my eyes look brighter. Once you've looked at it a while, the original photo really reveals how grey one's eyes can appear without careful photo shoot planning. At least, we can fix it with Photoshop, gently or more drastically.