I decided to continue some old vray eyes render tests during my christmas holidays but this time in 3dsmax instead of Maya. I was finally able to have some interesting refraction on the side view which wasn't the case a while ago when I started experimenting vray. I still have a lot to learn so I'll probably make those eyes look better later.
Extra notes: I'm using sIBL to setup the environment and basic lighting and added a subtle vray light for the "squarish" highlight. The eye is also 24mm of diameter.