Eye Surface/Lid Anatomy
Eyebrows and Lashes
What is the main function of the sclera?
Protection/Structure
What fraction of the eye does the vitreous humor make up? - a.3/4 - b. 1/3 - c.2/3
c. 2/3
How many ocular muscles are there?
6
What percent of the vitreous gel is made of water?
99%
Name the largest oil glands located under the lid that keeps the surface of the eye hydrated.
Meibomian glands
Name the 3 structures the Uvea made up of.
Iris, Ciliary Body and Choroid
Name the two main sensory receptors of the retina!
Rods and Cones
What are the 4 rectus muscles?
Superior, medial, lateral, inferior
What is the Spanish word for cataract?
Catarata
The orbicularis oculi is the muscle that:
closes the eyelid
What kind of muscle does the iris use to constrict?
sphincter pupillae
The retinal arterioles and veins are branched out through the retina. What structure do they all lead back to?
The optic nerve
What are the 2 oblique muscles and how do they move the eye?
Superior and Inferior; Superior move eye down and in; Inferior moves eye up and in
What are the functions of rods and cones?
Rods- Night vision
Cones - Color and Central Vision
What is it called when the eyelashes turn inward.
Trichiasis
What is the trabecular meshwork and what is its purpose?
Tiny pores in the ciliary body that filters aqueous humor to the canal of Schlemm (which then brings humor to aqueous veins)
Ora Serrata
If a patient is looking to their right, what muscle is being used for their left eye?
Medial Rectus
What age is the corneal fully formed?
2 years
Name the pathway tears take to exit the eye.
(4 structures)
Lacrimal gland ->punctum ->lacrimal sac-> nasolacrimal duct
Name the 5 layers of the cornea
A retinal detachment occurs when fluid accumulates under what retinal layer?
Retinal Pigment Epithelium
When a patient is looking up and to the left, what muscle is being used in their right eye?
Inferior Oblique
What is the optic chiasm?
The structure formed by the crossing of both optic nerves leading back to the brain.