start with a geosphere
Set the segments to 2, and the base type to octa.
Convert to editable poly, and select 4 faces on one side
Delete the selected faces, and select the vertices along the newly created hole. This is going to be the back of the eyeball, so the faces are not needed
Scale the verts to about 140%, you want the sphere to always fill up the eye socket even when it rotates, and this will help.
Target weld every other vertice on the next ring forward from the hole. This will reduce the poly's of this eye even further.
Target weld the vert in the blue box, to the vert on the edge of the hole, designated by the blue arrow. The green box shows where the last vertice was before it was target welded. The resulting eye is 20 poly's.
if you want convert to editable mesh
Add an unwrap UVW modifier and select all the faces.
Make a planner map and set averaged normals.
Make the UV look like this.
Skin the eye in a small about 80x80 px size at max and try to make it look something like this.
and final result
I just have to give credits to a friend,poopinmymouth for showing me how to do eyes.
I hope this helped people...
~halo aka mr.staby