The eye: three main parts: [Essay Example], 316 words GradesFixer

Haven't found the right essay?

Get an expert to write your essay!


Professional writers and researchers


Sources and citation are provided


3 hour delivery

This essay has been submitted by a student. This is not an example of the work written by professional essay writers.

The eye: three main parts

Print Download now

Pssst… we can write an original essay just for you.

Any subject. Any type of essay.

We’ll even meet a 3-hour deadline.

Get your price

121 writers online

Download PDF

The eye is a complex and sensory organ that is specialized for the gathering of visual information. The eye is made up of three main parts: eyeball (globe), orbit (eye socket), accessory (adnexal) structures.

  • Accessory structure
  • The eye’s accessory structures include the eyelids, conjunctiva, caruncle and lacrimal glands. The eyelids are folds of skin that cover and protect the eye. It contains glands, which produce an oily secretion which in turns covers the tear layer and prevents tears from evaporating and the eyelids from sticking together. The conjunctiva is a clear mucous membrane that lines the inner surface of the eyelids and the outer surface of the eye. The conjunctiva secretes mucus to lubricate the eyeball and keep it moist. The caruncle is the small, pinkish portion of the innermost corner of the eye that contains oil and sweat glands and conjunctival tissue. The lacrimal gland (tear gland) is located at the upper, outer corner of each eye. The lacrimal gland secretes tears to keep the surface of the eye and lining of the eyelids moist and lubricated. Tears help to reduce friction, remove dust and debris from the eye and prevent infection.

  • Orbit (eye socket)
  • The orbit (eye socket) is made up of bone formed from the skull that contains the eyeball and the connective tissues. The bone and connective tissues cushion and protect the eye. Muscles attached to the eyeball make it move in different directions.

  • The eyeball
  • The eyeball (globe) is rich in blood vessels. Human eyes are roughly spherical, filled with a transparent gel-like substance called the vitreous humor. It supports the internal structures and maintains the shape of the eye.

    The eyeball consists of three concentric layers (tunics), whose names reflect their basic functions: a fibrous tunic, consisting of the sclera behind and the cornea in front; a vascular pigmented tunic, comprising the choroid, ciliary body, and iris; and a nervous tunic, the retina.

Remember: This is just a sample from a fellow student.

Your time is important. Let us write you an essay from scratch

100% plagiarism free

Sources and citations are provided

Cite this Essay

To export a reference to this article please select a referencing style below:

GradesFixer. (2019, February, 11) The eye: three main parts. Retrived February 22, 2020, from
"The eye: three main parts." GradesFixer, 11 Feb. 2019, Accessed 22 February 2020.
GradesFixer. 2019. The eye: three main parts., viewed 22 February 2020, <>
GradesFixer. The eye: three main parts. [Internet]. February 2019. [Accessed February 22, 2020]. Available from:

Sorry, copying is not allowed on our website. If you’d like this or any other sample, we’ll happily email it to you.

By clicking “Send”, you agree to our Terms of service and Privacy statement. We will occasionally send you account related emails.



Your essay sample has been sent.

Want us to write one just for you? We can custom edit this essay into an original, 100% plagiarism free essay.

thanks-icon Order now

Hi there!

Are you interested in getting a customized paper?

Check it out!
Having trouble finding the perfect essay? We’ve got you covered. Hire a writer uses cookies. By continuing we’ll assume you board with our cookie policy.