THE VESSEL ARCHITECTURE OF THE PARS-PLANA IN THE CYNOMOLGUS MONKEY, RAT AND RABBIT EYE - A SCANNING ELECTRON-MICROSCOPIC STUDY OF PLASTIC CORROSION CASTS
Rhw. Funk, THE VESSEL ARCHITECTURE OF THE PARS-PLANA IN THE CYNOMOLGUS MONKEY, RAT AND RABBIT EYE - A SCANNING ELECTRON-MICROSCOPIC STUDY OF PLASTIC CORROSION CASTS, Ophthalmic research, 25(6), 1993, pp. 337-348
In the cynomolgus monkey, rabbit and rat the architecture of the pars
plana vasculature was investigated using scanning electron micrographs
of resin casts. The most complex vessel architecture was found in the
cynomolgus monkey. Here, the pars plana venules have affluxes from th
e ciliary processes, ciliary muscle and iris. Numerous interconnection
s between these venules exist in the central portion of the pars plana
. Arterial affluxes reach the pars plana not until the choriocapillari
es. The variations of this architecture in the rat and rabbit are not
only caused by the different size of the ciliary muscle and its vascul
arization. In the rat the most peripheral part of the uveal supply of
the retina represents a transition form between pars plana venules and
the choriocapillaries. In the rabbit, two vascular layers exist in th
e pars plana while in the cynomolgus monkey and rat the pars plana ves
sels spread out in one plane. The functional significance of the vesse
l architecture and the species differences are discussed.