Eyelid Structure Diagram

The average aperture of the eyelids measures about 30 mm in horizontal width and approximately 10 mm in vertical height. Skin subcutaneous tissue orbicularis oculi orbital septum and tarsal plates and palpebral conjunctivaThe meibomian glands lie within the eyelid and secrete the lipid part of the tear film.

Eyelids Anatomy Pupil Iris Corneoscleral Junction Corneal Limbus Inferior Conjunctival Fornix Bu Anatomy Medical Anatomy Human Anatomy And Physiology

They form a barrier for the eyes against trauma excessive light and help in maintaining the tear-corneal film and also aid in pumping the tears toward the nasolacrimal duct system.

Eyelid structure diagram. The eyelids are suspended by tendons medially and laterally. Layers of the Eyelid. Muscle - orbital part of the orbicularis oculi muscle.

The orbicularis oculi muscle assists in the control of the eyelids and it receives additional assistance from the levator palpebrae superioris muscle which is designated to the upper eyelid and explains why the upper lid has more movement options than the lower lid. The skin is similar to areas elsewhere but is relatively thin and has more pigment cells. And meibomian or tarsal glands which secrete lubricating fluids.

The lacrimal drainage apparatus is protected by the anterior leaflet of the medial canthal tendon which is cut away in this diagram. It consists of the following parts. The inner surface of each eyelid and parts of the eyeball are covered with mucous membrane called the conjunctiva.

This diagram demonstrates the conceptual split between the anterior lamella skin and orbicularis right side and posterior lamella tarsus and conjunctiva left side of the eyelid. The lower lid extends below the inferior orbital rim to join the cheek forming folds. Human eyelids contain a row of eyelashes that protect the eye from dust particles foreign bodies and perspiration.

Another important aspect is the beauty and expression of the face that is provided by the muscles in the lid. The eyelids play an important role in protecting the globe. From an anatomical point of view the eyelid consists primarily of skin underlying soft tissue also called a subcutaneous tissue and a thin layer of muscle called the orbicularis oculi.

A Structure of the eyelids. The human eye consists of the eyeball optic nerve orbit and appendages eyelids extraocular muscles and lacrimal glands. Muscles which move the eyelids.

The highest peak on the upper eyelid lies slightly nasal and the lowest contour of the lower eyelid rests slightly lateral. The eyelids are soft tissue structures that cover and protect the anterior surface of the eyeball. The External Structure of an Eye.

Eyelid muscles conjunctiva tear gland human eye front view ophthalmology infographics eye glands eye diagram poster cornea anatomy face skin cut carotid surgery. It is the outer covering a protective tough white layer called the sclera white part of the eye. See eyelid anatomy stock video clips.

Try these curated collections. While the eyeball is the actual sensory organ the other parts of of the eye are equally important in maintaining the health and function of the eye as. Upper Eyelid Anatomy The Plastics Fella.

4 EYELID MARGINS 2mm in width Each lid margin divided into 2 parts by lacrimal papilla Lacrimal portion medially devoid of lashesglands and Ciliary portion laterally Approximately 100 to 150 cilia -upper eyelid and 50 to 75 cilia -lower eyelid arranged in two to three rows Glands of Zeis and Moll open into each hair follicle Dense plexus of nerves and vesssels around follicle exquisite tactile sensibility. Skin and Subcutaneous Tissue. It is made up of dense connective tissue and protects the inner parts.

The upper eyelid extends superiorly to the eyebrow which separates it from the forehead. The eyelids are two movable folds situated above and below front of the eye. The lids are covered with skin lined with mucous membrane and bordered with a fringe of hairs the eyelashes.

The skin and subcutaneous tissue form the most superficial layer of the eyelid. The layer of skin is among the thinnest in the human body. Under this muscle are other issues that divide the area into different planes.

1229 eyelid anatomy stock photos vectors and illustrations are available royalty-free. The gray line which is the muscle of Riolan the most superficial aspect of the orbicularis muscle is also shown. The front transparent part of the sclera is called cornea.

When eye is open the upper lid covers about 16 th of the cornea the lower lid just touches the limbus. Each eyelid contains a fibrous plate called a tarsus that gives it structure and shape. It is a white visible portion.

The Human Eye Eyeball Diagram Parts and Pictures. The parts of the eye that are visible externally include the following-. Each eyelid is divided by a horizontal furrow sulcus into an orbital and tarsal part.

From superficial to deep these are. The eye contains a muscle that retracts the eyelid to open the eye either voluntarily or involuntarily. On their free edges there are outgrowths of hairs the eyelashes.

The eyelids comprise of an upper and lower eyelid joined at the medial and lateral canthi. The anatomy of the eyelid may seem complex but if we dissolve its multi-layered structure it is actually quite simple. The eyelid consists of five main layers superficial to deep.

Skin and subcutaneous tissue. The third eyelid is vestigial and is called plica semilunaris nictitating membrane. It lines the sclera and is made up of stratified squamous epithelium.

The eyelid is made up of several layers. EYELIDS AND EYELASHES ANATOMY The eyelids are also known as the palpebrae and are formed by the reinforced folds of skin that are attached to the slight skeletal muscles which permit movement. A human eye is roughly 23 cm in diameter and is almost a spherical ball filled with some fluid.

The lacrimal gland is located at the superolateral aspect deep to the orbicularis oculi. An eyelid is a thin layer of skin that covers and protects the eye.

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