We use the “Red Eye tool” only remove red area by black color of eye. It’s work like as color replacement tool.
How to use of the Red Eye tool:
Using of the Red Eye tool is very easy. Follow the example to understand this tool.
At first open the Photoshop upgrade version i.e. CS5 or CS6.
Open a human picture with red eye.
You can zoom in this picture to edit perfectly.
Select the Red Eye tool from tool bar.
Then just click on the red eye of the human.
You will see red color replace in black color.
Now you can save this image.