A kinda realistic procedural eye shader and mesh that can be changed as you require.
6/2/23: Updated mesh to be way more low poly than before, tweaked some shader settings, and grouped nodes for easier navigation.
Thanks man :), the mesh is a bit high poly I've come to realize, so if you use it just edit mode and select all the edges and un-subdivide, should work just fine without messing it up :)
niiiiiice