Buy it here: https://www.artstation.com/marketplace/p/kzBq/eye-with-procedural-materials-changing-pupil
Procedural Materials
Materials created using procedural blender nodes. That gives unlimited possibilities in resizing without any loss of quality.
Iris Colors
40 color presets and an infinite amount that you can create.
Pupil Shapekeys
12 shapekeys that provide opportunities to create a wide variety forms of the Pupil.