a procedural eye ball made in Blender for Blender users with shading. everithing is procedural so you can adjust it for what you like the most.is all the 3 relises of the eye iris inside: from the original to the 3.0 version that is the most accurate.you can find all the iris shading materials in the shading tab (slot 1) of blender witch include the cornea that you can find in slot 2.to switch from one to another you just have to (ctr+shift+click the principled node that you want from the shading window or connect that manually to the material output)you can use for ex. the original for more cartoon style stuff and the 3.0 for more realistic stuff, or start with one of the 3 inside and do your own by just changing some values. hope you enjoy.