Chambers and Segments of the eyeball

The eyeball can be divided into two segments:
anterior and posterior.

1. Anterior segment. It includes crystalline lens (which is suspended from the ciliary body by zonules),
and structures anterior to it, viz., iris, cornea and two aqueous humour-filled spaces : anterior and posterior chambers.

•   Anterior chamber. It is bounded anteriorly by the back of cornea, and posteriorly by the iris and part of ciliary body. The anterior chamber is about 2.5 mm deep in the centre in normal adults.
  It is shallower in hypermetropes and deeper in myopes, but is almost equal in the two eyes of
  the same individual. It contains about 0.25 ml of the aqueous humour.
• 
  Posterior chamber. It is a triangular space
  containing 0.06 ml of aqueous humour. It is
  bounded anteriorly by the posterior surface of
  iris and part of ciliary body, posteriorly by the
  crystalline lens and its zonules, and laterally by
  the ciliary body.

2. Posterior segment. It includes the structures
posterior to lens, viz., vitreous humour (a gel like
material which fills the space behind the lens), retina,
choroid and optic disc.