Flashcards in Unit VIII - Eye Deck (108)
What structures of the eye are derived from the neuroectoderm of the forebrain?
Retina and pigmented structures
The lens and cornea are derived from what specific embryological layer?
The fibrous coats (sclera) are derived from which specific embryological layer?
Neural crest mesenchyme
What is the term for the white part of the eye?
What happens to the sclera if pressure inside the eye increases?
Shape is maintained due to its thick, dense, and firm structure
Does light pass through the sclera?
No, it is opaque
What things pass through the many tiny openings seen on the sclera?
Blood vessels and neurons
What attaches to the sclera?
What is the term for the location where the sclera transitions into the cornea?
What is the sclera continuous with posteriorly?
Fibrous sheath (made of arachnoid) that covers cranial nerve II
What lines the sclera anteriorly?
What part of the eye of transparent and clear?
What is the primary structure of the eye used for focusing light?
Is the cornea concave or convex anteriorly?
What layer of the cornea is continuous with the conjunctiva?
What is the largest/thickest part of the cornea?
What is the innermost layer of the cornea?
What does the endothelium of the retina line?
What are the layers of the cornea in order from outermost to innermost?
Corneal epithelium, anterior limiting lamina, substantia propria, posterior limiting lamina, endothelium
What makes up the fibrous tunic of the eye?
Sclera and cornea
What makes up the vascular tunic of the eye?
Choroid, ciliary body, and iris
Which tunic of the eye is the only complete layer?
Fibrous tunic (makes it all the way around the eye)
Which tunic of the eye has many blood vessels and lots of autonomic influence (especially sympathetic)?
What special effect may be possessed by the blood vessels that supply the vascular tunic of the eye?
Where is the only location where the choroid is anchored to the sclera?
Where the optic nerve penetrates it
What is the choroid loosely attached to?
What is the purpose of the dark pigment of the choroid?
Helps limit passage of light both through sclera to retina and through retina to sclera
What is the ciliary body continuous with?
What structure is suspended by the ciliary body?