Sclera - Function (M2)

Question 1

what type of framework does the sclera provide

Answer 1

strong, tough external framework to protect delicate intraocular structures

Question 2

what does the sclera maintain

Answer 2

shape of the globe - offers resistance to internal and external forces

Question 3

what is the sclera an insertion site for

Answer 3

EOMs

Question 4

what do the apertures and foramen in the sclera allow

Answer 4

nerves and blood vessels to enter and exit the globe

Question 5

location of anterior apertures and what passes through

Answer 5

near recti muscle insertions.
holes for anterior ciliary arteries and veins.
long ciliary nerve may also enter –> axenfeld loop (may be surrounded by pigment)

Question 6

location of middle apertures and what passes through

Answer 6

just posterior to equator.
holes for vortex vein - 4 total, one in each quadrant

Question 7

location of posterior apertures and what passes through

Answer 7

around scleral canal (posterior foramen).
holes for short posterior ciliary arteries, long posterior ciliary arteries, short ciliary nerves, and long ciliary nerves

Question 8

what is the anterior foramen

Answer 8

area/hole occupied by cornea

Question 9

what is the posterior foramen

Answer 9

aka scleral canal.
hole in the back of the sclera for central retinal artery, central retinal vein, and optic nerve fibers.

Question 10

what is the posterior foramen transversed by

Answer 10

scleral fibers - form a fenestrated scaffold called lamina cribrosa.
weakest area of sclera