I created this eye tutorial for you. So you can see it step by step.
This time a more manga like eye, but a bit more detailed then the most common manga eyes.
Also, feel free to post you try! I would love, really love to see! Please like my facebook for more tutorials!
The second last step, I just colored on a NEW layer those colors, blurred then with the watertool or if you prefer the blur tool, its up to you. Then I changed the layer mode to as you can read on the left side of the last eye, luminocity. That "mode" will give it that glowy effect. If you still don't understand, I'm planning to make also a video about this tutorial, where I will show exactly what I do Hope it helps
*you can find the layer mode between the layers and your navicater. It is just called "mode"