External Structure Of Eye

There are 6 extraocular muscles attached to the sclera of each eye. They control the movements and directions of the eye.

The Parts Of The Eye External Ear Anatomy Ear Anatomy Anatomy

It is a white visible portion.

External structure of eye. It is tough tissue which serves as the eyes protective outer coat. It is clear like glass transparent and has no blood vessels in it. When uveitis or an autoimmune disorder affects the lacrimal glands dry eye syndrome can result.

It is the small aperture located in the centre of the Iris. Part of the sclera can be seen at the front of the eye. The outer covering of the eyeball consists of a relatively tough white layer called the sclera or white of the eye.

There are six extraocular muscles that control eye movements. The cornea allows light to enter the eye. The birds eyes.

Figure 23 1 External Anatomy Of The Eye And Accessory Extraocular muscles help move the eye in different directions. The lens then changes shape to allow the accurate focusing of light on the retina. The eye is a hollow spherical structure measuring about 25 cm in diameter.

Eye lashes span outwards. Its function is to refract light rays that reach the eye providing most of the refractive or focusing power. This extraocular muscles work together so that the eye can move simultaneously and view the same object.

The sclera is the white covering that protects the eye commonly known as the white of the eye. It allows light to enter and focus on the retina. Since the skull is lighter compared to the human skull adjusted for size the eyes take up about 15 of the weight.

It is the pigmented coloured portion of the eye visible externally. The upper lid covers upper portion of cornea when the patient is looking straight. This gland is located on the upper lateral wall of the eye under the eyebrow.

It is made up of dense connective tissue and protects the inner parts. Alignment position of the eyes the conjunctiva and sclera. The eyes contain special sensory cells called cones and rods that convert light into electrical impulses to be carried to the brain for interpretation.

He eye is the organ of sight. The outer fibrous coat sclera cornea. The eyes sit in bony cavities called the orbits in the skull.

Near the front of the eye in the area protected by the eyelids the sclera is covered by a thin transparent membrane conjunctiva which runs to the edge of the cornea. As light passes through the eye the iris changes shape by expanding and letting more light through or constricting and letting less light through to change pupil size. Structure of Human Eye.

Its wall is composed of three coats. Light enters the eye by passing through the transparent cornea and aqueous humor. The lacrimal gland creates the water layer of the tears that lubricate cleanse nourish and protect the surface of the eye.

The sense of sight. The main parts of the human eye are the cornea iris pupil aqueous humor lens vitreous humor retina and optic nerve. Examination of the external eye includes inspection of the alignment and position of the eyes and evaluation of surrounding structures conjunctiva sclera cornea iris pupils and extraocular movements.

Most of the eye is enclosed in a bony orbit Structureo Cheekboneo Foreheado Templeo Side of nose FunctionProvides protection to the eye. It lines the sclera and is made up of stratified squamous epithelium. The front visible part of the eye is made up of the whitish sclera a coloured iris and the pupil.

Blinking on the other hand which is closing and opening the eye rapidly spreads tears across and and removes irritants from the cornea and conjuctiva. Bony orbit eyelids eyelashestears and fat glands extra ocularmuscles conjunctiva. The neck connects the head to the body.

T are larger compared to the birds skull and are therefore proportionally larger than human eyes. The main function of the iris is to control the diameter of the pupil according to the light source. However if one of the muscles is too weak or too strong a misalignment of eyes will occur.

Eyeballs are symmetrical in size and position. This is the see-through skin that covers the eye. A thin layer called the conjunctiva sits on top of this.

The External Structure of an Eye. External structure of the eye Sclera. In this article we will discuss about the structure of human eye.

The parts of the eye that are visible externally include the following-. This five-layered membrane is continuous with the Sclera. They are stimulated by light.

The iris controls the size of the pupil which is the opening that allows light to enter the lens. The middle vascular coat choroid ciliary body iris. Unlike that of the Lens the focusing power is fixed.

The structure of the human eye is made of three layers. The Human Eye The eyes are responsible for one of the most important senses. The eyeballs are in the same plane as eyebrow and maxilla.

Medical Encyclopedia Structure And Function How The Eye Works Structure And Function Lesson Plan Templates Behavioral Science

Pin By Lawrence Adomako On Diagram Sinus Cavities Nasal Cavity Maxillary Sinus

00399 Jpg 1135 1041 Eye Anatomy Optometry Eye Health

Veterinary Online Ophthalmology Animals Veterinary Online Eye Anatomy Eye Anatomy Diagram Medical Anatomy

The Cornea Is A Transparent External Lens Of The Eye That Serves A Protective Wall To Keep Out Foreign Science And Nature Latest Science News Science For Kids

External Structure Of Eyes Realistic Eyes Realistic Male Sketch

Ophthalmology Lecture Eye Anatomy Part 1 Eye Anatomy Anatomy Eyes

Anatomy Of The Eye Google Search Eye Anatomy Parts Of The Eye Anatomy

Eye Orbit Eye Anatomy Human Anatomy And Physiology Anatomy

Eye External And Internal View Www Anatomynote Com Eye Anatomy Diagram Of The Eye Parts Of The Eye

External Eye Eye Drawing Eye Drawing Tutorials Realistic Eye Drawing

Kenali Struktur Mata Eye Health Eye Structure Health Beauty

External Anatomy Of The Eye And Surrounding Accessory Structures A Photo Of A Access Anatomy External Photo

External Anatomy Of The Eye Anatomy Eyes College

The Pupil Eye Anatomy Iris Eye Anatomy

External Eye Anatomy Beautiful Human Eye Anatomy Stock Royalty Free Of External Eye Anatomy Awesome Lab 10 Ex 22 26 Huma Eye Anatomy Vision Eye Blue Eye Makeup