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Ultrastructural Studies of The Pigment Epithelium
of Retinae of Some Reptiles
Fairoze
Khattab
; Fahmy I. Khattab; Nagui Fares and Aman Zaki
(Department of Zoology, Faculty of Science ,Ain Shams
University,
Abbassia,
Cairo, Egypt.
Abstract
The present work was designed to reveal the fine structure of the
pigment epithelium of the retina in four different reptiles: the homed viper Cerastes cerastes (diurnal
and nocturnal), the European Chameleo chameleon (diurnal),the gold skink Eumeces schenrdii (diurnal) and the Egyptian gecko Traentola annularis (nocturnal)
. The pigment epithelium of each type reptiles possessed certain unique
features in their morphology and ultrastructure to
accommodate with their day and night activity. The most striking
feature was the presence of myoid bodies in the pigment epithelium of the diurnal
reptiles. These bodies trigger the photomechanical movement of the myoid region in cones of their retinae.
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