Abstract
The aim of the present paper was to reexamine fine structural characteristics and glycogen topochemistry of ciliary processes in small laboratory mammals (hamsters, guinea-pigs and mice). A two-layered epithelium continuously covered all ciliary processes. The epithelium consisted of inner nonpigmented and outer pigmented cells whose apices faced each other. They were linked by desmosomes and tight junctions. Basal cell aspects showed extensively interdigitating processes adjacent to the inner (rarely also outer) basal lamina. The ciliary process core was made up of reticular fibers, few fibrocytes, and capillaries with or without fenestrations. No glycogen particles were found in the ciliary epithelium using the PA-TSC-SP procedure.
Highlights
MATERIAL AND METHODSEarlier electron microscopic observations showed that a nonpigmented layer of the ciliary epithelium is directly involved in the production of the aqueous humour that occupies the anterior and posterior chambers of the eye
The ciliary processes were covered by a two-layered ciliary epithelium (Fig. 1)
The epithelium consisted of an inner layer of nonpigmented cells facing the posterior chamber and an outer layer of pigmented cells that were in contact with the connective tissue stroma
Summary
Earlier electron microscopic observations showed that a nonpigmented layer of the ciliary epithelium is directly involved in the production of the aqueous humour that occupies the anterior and posterior chambers of the eye. In connection with a research project on the ciliary body, the author decided to compare the fine structure of the ciliary epithelium and ciliary processes in a number of small laboratory animals and to find a suitable and reliable experimental model for directed histo- or ultrahistochemical examination. The aim of this paper is to provide information on the first micromorphological observations including the results of glycogen visualization in the ciliary processes.
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