Mohammed Khaled Hassaan*

Student at Faculty of Veterinary Medicine, Kafr Elsheikh University, Egypt

*Corresponding Author: Mohammed Khaled Hassaan, Student at Faculty of Veterinary Medicine, Kafr Elsheikh University, Egypt.

Received: November 05, 2021 Published: December , 2021

Abstract

The eye structure divided into three main parts are accessory structure around the eye, eyeball and the eye chamber & refractive media. The orbit is a bony cavity around the eye. There are three eyelids: upper, lower and third. Structure of upper and lower eyelid is skin and subcutaneous tissues, muscular layer, fibrous layer, The third eyelid is located at the medial canthus of the eye and consists of nictitating membrane, hyaline cartilage and lymph glands. Lacrimal apparatus consists of lacrimal gland, excretory ducts, puncta lacrimalis, lacrimal canaliculi, lacrimal sac and nasolacrimal duct. Lacrimal gland produces tears whereas nasolacrimal apparatus transmission it. The eye ball consists of three concentric coats are the fibrous coat, vascular pigmented coat (uvea) and nervous coat. The corneal structure is fibrous and cellular parts whereas sclera is fibrous only. The limbus is the junction between cornea and sclera and contains circular venous plexus that drain the aqueous humor of the anterior chamber. Vascular tunic consists of choroid, ciliary body and iris. The retina is a double layer: outer pigmented layer and inner neural layer and consists of two parts: pars optica and pars ceca. The eye chambers are three which arranged according to the size from biggest to smallest as the following; vitreous, anterior and posterior chamber. Refractive media is a cornea, aqueous humor, vitreous body and lens. The major eye development occurs between week 3 and week 10, involving ectoderm, neural crest cells, and mesenchyme. The vertebrate eye comprises tissues of various embryonic origins: the lens and cornea are derived from the ectoderm surface, while the iris and ciliary body retina and epithelial layers are derived from the anterior neural plate. Retinal ganglion cells develop towards the optic stalk which forms the optic nerve.

Keywords: Food; Vision; Cornea; Anterior Chamber

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Citation

Citation: Mohammed Khaled Hassaan. “The Animal Eye Anatomy and Development". Acta Scientific Veterinary Sciences 4.1 (2022): .

Copyright

Copyright: © 2022 Mohammed Khaled Hassaan. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.