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List the accessory structures of the eye.
Eyelids, eyelashes, and superficial epithelium, and the structures of the lacrimal apparatus
This is the transparent area on the anterior surface of the eye through which light travels to enter the eye.
This is the opening at the center of the colored iris through which light passes into the eye after it passes the cornea.
This is the covering of the inner surface of the eyelids and outer surface of the eye.
This structure produces, distributes, and removes tears.
The lacrimal apparatus is composed of what 6 structures?
- 1) Lacrimal Gland
- 2) Lacrimal Puncta
- 3) Lacrimal Canaliculi
- 4) Lacrimal Sac
- 5) Nasolacrimal Duct
- 6) Tear Ducts
This structure produces tears which lubricate, nourish, and oxygenate the corneal cells.
This is an antibacterial enzyme found in tears.
This structure delivers tears from the lacrimal gland to the space behind the upper eyelid.
This structure consists of 2 small pores that drain the lacrimal lake.
This structure is a small canal that connects the lacrimal puncta to the lacrimal sac.
This structure is a small chamber that nestles within the lacrimal sulcus of the orbit.
This structure originates at the inferior tip of the lacrimal sac and allows tears to pass through it to the nasal cavity.
What is the name of the disease that causes inflammation of the conjunctiva?
Conjunctivitis (or Pinkeye)
The wall of the eye has 3 layers, what are they?
1) Fibrous 2) Vascular 3) Inner
The outermost layer of the eyeball, which consists of the cornea and sclera.
What are the 3 main functions of the fibrous layer of the eyeball?
- 1) Supports and protects
- 2) Attachment site for the extrinsic eye muscles
- 3) Contains cornea, whose curvature aids in focusing, and light first enters the eye through it
The layer of the eyeball that contains numerous blood vessels, lymphatic vessels, and smooth muscles of the eye.
What are the 4 main functions of the vascular layer of the eyeball?
- 1) A route for blood vessels and lymphatics that supply tissues
- 2) Regulating the amount of light that enters
- 3) Secreting and reabsorbing aqueous humor fluid
- 4) Controlling shape of the lens for focusing
The vascular layer is composed of what 3 structures?
1) Iris 2) Ciliary Body 3) Choroid
This structure in the vascular layer contains pigmented cells which give eye color, and smooth muscle fibers which control the size of the pupil.
This structure in the vascular layer is a thickened region that bulges into the eye and acts as an anchor for the suspensory ligaments which hold the lens in place.
This structure in the vascular layer is covered by the sclera, and has an extensive capillary network that delivers oxygen and nutrients to the neural tissue within the neural layer.
Choroid or Choroid Coat
The layer of the eyeball that is the innermost layer of the eye and is where light energy is gathered.
Inner Layer (or Retina)
Cells that are sensitive to light; located in the inner layer.
The ciliary body and lens divides the eye into 2 substructures, what are they?
- 1) Anterior Cavity (in front of lens)
- 2) Posterior Cavity (behind lens)
The anterior cavity is divided into what 2 structures?
- 1) Anterior Chamber (in front of iris)
- 2) Posterior Chamber (between iris and lens)
What type of fluid is found in the anterior cavity?
What type of fluid is found in the posterior cavity?
This fluid provides route for nutrient and waste transport, and cushioning, it also helps retain the eye's shape and retina position; it goes by 2 names depending on what cavity it is in.
Aqueous Humor (in anterior cavity) or Vitreous Humor (in posterior cavity)