Choose any Ripped edged brush and Do several strokes inside the selected are with different colors.

Very fast!

Create an element of the face - a human eye

Choose a filter, but before this further the selection by 3 - 5 pixels.

Create an element of the face - a human eye

Apply Redial blur (ZOOM) to the selected area.

Create an element of the face - a human eye

And here is the result of all this Fast made madness :).

Create an element of the face - a human eye

Well, defiantly looks like onside of the eye. I tell you it was created in less than a minute.

I would like to color balance this a little bit. Hue saturation and Color balance tools.

Create an element of the face - a human eye



Create an element of the face - a human eye

Drag the layer to this very position beneath the
 
black circle.

Create an element of the face - a human eye



Create an element of the face - a human eye

Create clipping mask.

Create an element of the face - a human eye

Here we have.

Create an element of the face - a human eye

I will warp my initial layer to make a form that is closer to human eye.

Create an element of the face - a human eye

I'm also changing some layer styles settings of this very layer.

Create an element of the face - a human eye



Create an element of the face - a human eye

And we a re ready with this one. Our element is ready.

Now you probably know one of the fast ways to create a human eye.
Create an element of the face - a human eye
Enjoy and I hope you found something useful for you. Cheers.