Which component of the eye has a maximum refractive index –
Lens has maximum refractive index among the refractive structures of eye. The refractive indices of the successive layers of lens increase from the periphery towards the nucleus. Therefore :-


Anterior lens cortex →  Refractive index is 1.386.
Posterior lens cortex → Refractive index is 1.386.
Centre of lens (nucleus) →  Refractive index is 1.46.
Anterior surface of the lens
Posterior surface of the lens
Centre of the lens
Cornea