Creating an Eye shader in maya

I've just textured the eye and created a shader for it. For this horse its quite simple, ive just created two spheres and the outer one has the mia_material_x applied to it with the thin glass preset. I then turned the refraction colour down to 25% grey and then added a simple texture map to the sphere inside it.

The reflection was also turned way up because from all the reference photos of horse eyes the pupil is very large and the sclera is very reflective. Of course this image doesnt reflect much but it will when i shoot the background plate. For now I created a spotlight and light linked it to the eye and the Gunky stuff arond it etc so it lights the eye but doesnt effect the actual head.