Structure of the eyeball

Httpbitly2GB41bUWatch drbeen videos HERE. These layers lie flat against each other and form the eyeball.

OUTER LAYER FIBROUS COAT.

Structure of the eyeball. The eyeball consists of three layers. Fibrous vascular pigmented and nervous retina. Functionally the most important layer is the retina which receives the external visual stimuli.

The posterior pole of the eyeball is connected with the optic nerve CN II which conveys the information from the retina to the brain. Other important structures in the eyeball include the iris and the lens. Much of the eyeball is filled with a transparent gel-like material called the vitreous humour that helps to maintain the spheroidal shape.

Immediately beneath the sclera is an underlying vascular layer called the uvea that supplies nutrients to many parts of the eye. Subscribe to the drbeen Channel HERE. Httpbitly2GBhiS0For more content from drbeen click HERE.

Httpbitly2GB41bUWatch drbeen videos HERE. In this video Dr. Jones discusses the structure of the eyeball.

Jones explains the following. The walls of the eyeball. The contents of the eyeball.

The main vasculature supply and venous daring of the eyeball. The video includes questions throughout to emphasis the important aspects of. Structure of eye balleyeball is a specialized sense organ that helps us to understand our environment.

It is a sensory unit composed of three parts. Receptor sensory pathway and a brain center The main parts of the human eye are The Conjunctiva ScleraChoroid Cornea Iris Pupil Anterior Chamber Posterior Chamber Aqueous humor Lens Vitreous humor RetinaMacula and Optic nerve. Division and structure of the eyeball.

Anatomically the eyeball can be divided into three layered parts. These layers have different structures and functions. Now we will look at these layers in more detail.

The fibrous layer of the eye is the outermost layer. Structure of eyeball The adult eyeball is a hollow spherical structure. Out of its total surface area only the front one sixth remains exposed.

The rest of the eyeball is embedded in a bony socket. Six eye muscles attach the eyeball to the bones. The muscles hold the eyeball in position and their contractions also permit certain amount of movement.

Top of the page Eye Anatomy and Function Topic OverviewThe eye is shaped like a round ball with a slight bulge at the front. The eye has three main layers. These layers lie flat against each other and form the eyeball.

The outer layer of the eyeball is a tough white opaque membrane called the sclera the white of the eye. The slight bulge in the sclera at the front of. The External Structure of an Eye.

The parts of the eye that are visible externally include the following-. It is a white visible portion. It is made up of dense connective tissue and protects the inner parts.

It lines the sclera and is made up of stratified squamous epithelium. Anterior portion of the vascular tunic forming an internal muscular ring toward the front of the eyeball suspensory ligaments structures which attach ciliary muscles to the lens. Chambers of the eyeball.

The eyeball is divided into 2 chambers by the lens. The region between the cornea and the lens is the aqueous chamber. Aqueous chamber is further divided into anterior chamber between cornea and.

The eyeball has three coats as given below. External fibrous coat The anterior transparent one-sixth part of the eyeball is called cornea. This refracts the rays of light into the eye.

Cornea further extends with a membranous structure called conjunctiva. The connecting area of cornea and conjunctiva is limbus. External fibrous coat is formed of.

Each eyeball is a cystic structure kept distended by the pressure inside it. Although generally referred to as a globe the eyeball is not a sphere but an ablate spheroid. The central point on the maximal convexities of the anterior and posterior curvatures of the eyeball is called the anterior and posterior pole respectively.

19 Internal Structure of the Eyeball. Maria Peris-Celda Carlos Diogenes Pinheiro-Neto and Edward J. Right eyeball and optic nerve anterior view.

Right eyeball and optic nerve lateral view. Internal view of each half of. Most of the eyeball is within and protected by the orbit formed by the lacrimal maxilla zygomatic frontal sphenoid and ethmoid bones.

The six extrin-sic muscles of the eye Fig. 94 are attached to this bony socket and to the surface of the eyeball. There are four rectus straight muscles that move the eyeball up and down or side to side.

The name tells you which direction. The video includes questions throughout to emphasis the important aspects of the structure of the Eyeball. Videos in this module - view all Visual System.

Structure Of The Eyeball Currently Watching 0702 Questions. Eye structure Eyeball 3D Human Anatomy Organs Eyes are the organs of vision. They detect light and convert it into electro-chemical impulses in neurons.

Structure and Function The eye transmits visual stimuli to the brain for interpretation and in doing so functions as the organ of vision. The eyeball is located in the eye orbit a round bony hollow formed by sev-eral different bones of the skull. In the orbit the eye is.

STRUCTURE OF THE EYEBALL 1. Wall of eye ball 2. Light transmitting media or refractive media 4.

WALL OF THE EYEBALL. OUTER LAYER FIBROUS COAT. SCLERA AND CORNEA MIDDLE LAYER VASCULAR COAT.

CHOROID CILIARY- BODY AND IRIS INNER LAYER NERVOUS COAT. Parts of the Eye Outside the Eyeball. The eye sits in a protective bony socket called the orbit.

Six extraocular muscles in the orbit are attached to the eye. These muscles move the eye up and down side to side and rotate the eye. The extraocular muscles are attached to the white part of the eye called the sclera.

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