The equator of the eyeball is the virtual line corresponding to the greatest circumference of the eyeball equidistant between the anterior and posterior poles.
Cutaway diagram of the human eye lens showing the location of PSCs
Orbits and eyes Illustrations: normal anatomy
Postremal chamber of eyeball - e-Anatomy - IMAIOS
Pupil - e-Anatomy - IMAIOS
Equator of eyeball - e-Anatomy - IMAIOS
Eyeball - e-Anatomy - IMAIOS
Fundoscopic photograph of a normal retina indicating the regions
Orbits and eyes Illustrations: normal anatomy
Foundation Volume 1, Chapter 1. Topographic Anatomy of the Eye: An Overview
Capillary lamina - e-Anatomy - IMAIOS
Orbits and eyes Illustrations: normal anatomy