Histoanatomical study of lens and ciliary body in guinea pig eye
Subject Areas : Veterinary Clinical Pathologymohammadali Ebrahimi saadatlou 1 , hasan salehvand 2
1 - دانشیار گروه علوم پایه، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران.
2 - Department of basic sciences. Tabriz branch. Islamic azad university.Tabriz. Iran.
Keywords: guinea pig, lens, ciliary body, histo-anatomy,
Abstract :
In the present study, a total number of 10 guinea pig eyes were studied macroscopically and microscopically (with staining by H&E, Verhoeff, Van Gieson, and P.A.S.). The results showed that posterior surface of lens was more convex than anterior surface. The average lens diameter and thickness were respectively measured as 0.61±0.02 and 0.45±0.024 centimeters. The average ciliary body thickness was measured as 0.25±0.03 centimeters. In addition, the ciliary body’s mean external diameter as 0.92±0.03 centimeters and the number of ciliary body process is about 68. The epithelium of lens was cuboid and the lens capsule as positive PAS reaction intensively. The anterior surface of capsule was thicker than posterior one. The lens fibers in the central part were thicker than other parts and the elastic fibers in lens were not observed. The epithelium of ciliary processes has two layers; the superficial layer was non-pigmented and culumnar with eosinophilic cytoplasm. Deep layer of epithelium was non-pigmented and cuboid with clear cytoplasm. There was not any pigments in subepithelial tissue. The subciliary process’s connective tissue had smooth muscle with longitudinal sections. There are a lot of thick elastic fibers in the ciliary body tissue. In conclusion, the major distinction of guinea pig in addition to differences of the lens and ciliary body’s dimensions was lack of pigmentation of epithelial cells of ciliary body.