The large chamber of the eye is filled with the gelatinous "vitreous humor", which has an index of refraction of about 1.337 . The front chamber of the eye, immediately behind the cornea, is filled with the watery "aqueous humor" which has an index of refraction of about 1.336.
The index of refraction of both of the interior fluids of the eye are very close to that of water, n= 4/3 = 1.333 .
The index of refraction of both of the interior fluids of the eye are very close to that of water, n= 4/3 = 1.333 .