Use Photoshop to fix red eye

Sometimes you may find that some photos you have taken have red eye. It s due to the reflection of light. There are several methods of fixing the red eye. I like to use "Layer with Apply Image" method. because it is easy to apply.
1. open the photo with red eye, control-click the photo then control-shift click again to add a white new layer.
2. Duplicating the photo layer then use circle selecting tool to select the red eyes.
3. Click(Image)(Apply Image), from the window display select channel and choose one colour(either red, green or blue, it depend on the black and darkness you think is more suitable.) then click "OK".
4. Click (Select)(Inverse) to inverse the selection, then click delete button to delete the surrounding parts.
5. Flatten the layers, the photo's eyes are fixed.