The Zonula Ciliaris has many other similar
names, including the Zonule
of Zinn, and simply Zonules (as indicated in the
In all cases these terms refer to the part of the of the human eye formed
by the change of structure of the hyaloid
membrane as it - and the vitreous
humour that it contains - moves in front of (anterior to) the ora
serrata - which is the area in which the retina
terminates as a jagged margin towards the front of the eyeball as it approaches
body (see below).
N.B. The distance between the ora serrata and ciliary body
is exaggerated on this diagram and the approx. position of the
Hyaloid Membrane at the position at which it becomes the Zonules
is shown as a dotted line for emphasis.
For further detail we recommend Gray's
Anatomy - which is informative yet inexpensive.