1. The lacrimal gland:
a. is a mucous gland
b. is supplied by parasympathetic
fibres after rely in the pterygopalatine
ganglion
c. the palpebral part is the preferred
site for biopsy
d. is responsible for the most posterior
layer of the tear film
e. is made up of alveoli and two
dozens ducts
2. The choroidal fissure:
a. fuses at about seventh
week of gestation
b. failure to close can occur in
association with cleft lip or palate
c. closure starts most posteriorly
and proceeds anteriorly till completion
d. allows the exit of the hyaloid
artery
e. coloboma can affect the iris,
ciliary body, choroid, retina or optic nerve.
3. The ciliary ganglion:
a. lies on the medial aspect
of the optic nerve
b. is one third of the way from
the back of the eye to the apex
c. sympathetic fibres from the middle
cervical ganglion passes through the
ganglion without
relay
d. parasympathetic fibres are carried
to the ganglion in the nerve to the
inferior oblique
e. most of the postganglionic fibres
in the short ciliary nerves supply the muscle of the ciliary body for accommodation
4. The optic nerve:
a. in the orbit the anterior
1 cm is supplied by the central retinal artery
b. in the orbit the posterior 3
cm received a branch from the ophthalmic
artery
c. the intracranial portion is supplied
by the middle cerebral artery
d. the optic nerve travels through
the optic canal with the ophthalmic
artery superior
and lateral to it.
e. meets the sclera at the posterior
pole
5. Horner's syndrome:
a. marked ptosis
b. impaired reaction to light and
accommodation
c. increased amplitude of accommodation
d. sweating on ipsilateral side
of face if lesion is below the superior cervical
ganglion
e. the pupil dilates with cocaine
eyedrop
6. Concerning the ciliary
ganglion:
a. it is about 4 mm in diameter
b. it is lateral to the optic nerve
c. its sensory root is a branch
of the nasociliary nerve passes through the
ganglion without
relay and supply the whole eyeball except the
conjunctiva
d. the majority of the postganglionic
parasympathetic fibres from the
ganglion supply
the sphincter muscle and cause pupillary constriction
e. it gives rise to long ciliary
nerve
7. Concerning the ophthalmic
division of trigeminal nerve:
a. lacrimal branch supplies
the skin of upper eyelid
b. infratrochlear nerve arises from
the nasociliary nerve supply the lower lid
c. the frontal nerve passes forward
beneath the roof of the orbit on the
upper surface
of the superior rectus muscle
d. nasociliary nerve is the largest
branch fo the ophthalmic nerve
e. the lacrimal nerve contains sympathetic
fibres to supply the lacrimal gland
8. Lens:
a. stability of the lens
protein depends on reduced sulfhydryl (SH) group
b. ascorbic acid level is higher
than the aqueous level
c. glucose oxidized to sorbital
in diabetic cataract
d. do not absorb ultraviolet light
e. most of the mitotic cells are
in the anterior pole
9. Accommodation:
a. pupil dilates during
accommodation
b. the anterior pole of the lens
moves forward
c. the lens sinks in the direction
of gravity
d. ciliary muscle pulls the choroid
forward
e. central region of anterior capsule
of lens is thicker than peripheral
10. Visual pigment:
a. all-trans-retinaldehyde
is isomerized to 11-cis-retinaldehyde when exposed
to light
b. peak absorption of rhodopsin
is about 800nm
c. retinoid is recycled within the
photoreceptor cells
d. most retinol exits in free form
in blood
e. uptake of retinol from blood
depends on pigment epithelium.
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