Morphological and Histological Structure of Eye in Lizard Hemidactylus flaviviridis


AbstractThe aim of the present study is to determine the anatomical and histological structure ofthe eye in lizard Hemidactylus flaviviridis (House gecko). The results show that eyelocated dorsolateral in the head and spherical, with elongated oval pupil. Histologically, itis composed of eyeball, lens and optic nerve. It is lack eyelid thus it was covered byexternal Tertiary spectacles. The eyeball appeared surrounded by three tunical they arefrom the inside to the outside tunica interna, tunica media, tunica fibrosa. The tunicainterna consist of the retina,and the retina composed of eight layers and two membranesare from outer to inner, the pigment epithelial layer, photoreceptor layer (rods and coneslayer), this layer showed one type of cones and two types of rods that were the single,double rods. External limiting membrane, outer nuclear layer, outerplexiform layer, innernuclear layer, inner plexiform layer, ganglion cell layer, nerve fibers layer, internallimiting membrane, one dorsal central fovea also appeared in retina. The tunica middlecomposed from choroid, ciliary body, iris, the ciliary body appeared with ciliary processesand unbranched, while the iris appeared hierarchical or triangular. The fibrous tunicaconsists of sclera which supported by hyaline cartilage in the hemisphere rear eye. Theanterior part of the tunica formed cornea which divided in to central cornea and peripheralcornea.Key words: Eyeball, Retina, Photoreceptor, Lizard (House Gecko)