16. The ciliary body:
a. is triangular in cross section and its posterior surface
is known as
the pars plana
b. is triangular in cross section and its apex faces anteriorly towards
the scleral spur
c. is wider temporally than nasally
d. has a base that is ridged and forms ciliary processes that support
the lens
e. is the site of surgical access to the anterior chamber via the pars
plana
17. When viewed microscopically:
a. the ciliary epithelium consists of 2 layers, separated in
some
places by small ciliary channels
b. the 2 cell layers of the ciliary epithelium have differing
pigmentation
c. the inner cell layer of the ciliary epithelium is responsible for
the
majority of aqueous humor production
d. the ciliary stroma consists of bundles of loose connective tissue
interwoven with numerous blood vessels
e. the ciliary stroma extends into the ciliary processes that have an
arterio-venous core
18. The ciliary muscle:
a. consists of 2 muscle groups
b. is innervated by postganglionic parasympathetic fibres from the
trigeminal nerve
c. is innervated by postganglionic sympathetic fibres from the
oculomotor nerve
d. on contraction, aids accommodation by moving the ciliary muscle
forward and inward via its circular and longitudinal
fibres
respectively
e. is attached to the scleral spur
19. The trabecular meshwork:
a. corresponds on the surface of the globe to the corneoscleral
limbus
b. has as its anterior border Schwalbe’s line, a continuation of
Bowman’s membrane
c. is square in cross section
d. is not in direct communication with the Sinus Venosus Sclerae
e. consists of branching laminae whose pores progressively decrease
in size towards the canal of Schlemm
20. Schlemm’s canal:
a. runs in a continuous circle at the corneoscleral limbus
b. is related posteriorly to the scleral spur
c. is drained by 25-30 collector channels that join the deep scleral
plexus, then the intrascleral plexus
d. collects aqueous humor that can drain via aqueous veins that join
the conjunctival veins directly
e. is oval or triangular in cross-section