6. The eyelids:
a. mainly protect the globe from injury by use of lashes
and gland
secretions
b. assist distribution of tears and their exit into canaliculi laterally
c. have more cilia on the upper lid
d. have squared edges at the lateral 5/6 and rounded edges at the
medial 1/6
e. are divided into superior and inferior palpebral sulci by the
insertions of the periocular muscles
7. The eyelids:
a. contain 4 different types of secretory glands
b. grow cilia that have the orifices of the Meibomian glands opening
into their follicles
c. have a surgically useful anatomical landmark known as the grey
line
d. grow cilia that do not possess erector pili muscles
e. meet at the medial canthus, which is the site of the papilla
lacrimalis
f. are supplied by the medial palpebral arteries that form anterior
to
the lacrimal sac
g. are supplied by the facial nerve
8. Levator Palpebrae Superioris:
a. takes its origin from the greater wing of the sphenoid and
above
and in front of the optic canal
b. has an aponeurosis that descends anterior to the orbital septum
and pierces it to attach to the posterior surface
of the tarsal plate
c. has a smooth muscle component supplied by sympathetic fibres
from thesuperior cervical ganglion
d. has dual innervation
e. is closely related to the ipsilateral superior rectus, being enclosed
in a common sheath
9. With respect to blinking and winking:
a. the reflex arc of tactile blinking has as its afferent nerve
the
ophthalmic division of the trigeminal
b.lids have a zip-like motion from medial to lateral
c. the reflex arc of visual blinking has as its efferent, the oculomotor
nerve
d. it is easier to wink your left eye if you are right hand dominant
e. blepharospasm can occur, and when marked is known as
myokymia
10. The cornea, viewed macroscopically:
a. has a radius of curvature greater than the rest of the globe
b. is only elliptical in shape on its anterior surface
c. is thickest at its centre
d. forms the anterior 1/8 of the globe
e. joins the sclera 5.5mm from the medial rectus insertion
f. joins the sclera 6.5mm from the inferior rectus insertion
g. joins the sclera 5.5mm from the lateral rectus insertion