The contained ZIP file contains all that you will need, just unpack the 'human eyes' folder and inside that main folder you will find all the necessary textures, HDRIs, and main scene file.
The attached maya scene file is the same as the one you will find inside the 'human eyes' project folder.
This is a high quality human eye that can be used with an CG character to add that one last final touch.
inside the texture folder you will find 6 4096 textures, these can be re-sized to any resolution you want, but to produce the presentation image 4k was used, 2k textures can be used as well, with little quality loss.
1x diffuse 1x specular 1x displacement 1x normal 1x reflection 1x transparency (for the pupil)
This eye is split into 3 pieces, inner outer and pupil for a total of 2600~ polygons.
outer eye is the cornea inner eye the scalera and iris
Mental Ray with final gather was used to produce all images
2x HDRI images are included and were used to get reflection and more accurate specular contributions on the final renders
The scene has a group for geometry, lights and the HDRI sphere
There are 2 render layers one for each HDRI, HDRI image files can be found the folder named HDRI.