It would seem you're missing the details.
Normal Eyes: Iris, pupil, and sclera (whites of the eye) present. Light spots and highlights on the iris to give it a gleaming or living appearance. Ex: post #2131147
Empty Eyes: Iris, pupil, and sclera present. Lacks the light spots or highlights giving the iris a flat or dead look. Ex: post #2062499
Blank Eyes: Iris and pupil missing, so only sclera present. Ex: post #1956359 (not to be confused with white eyes).
Hollow Eyes (based on the 9 images): Iris, pupil, and sclera missing. The eyes essentially appear to be gaping holes of darkness. Ex: post #1832571
