1. Retinoblastoma:
a. can present with rubeosis iridis
b. Flexner Wintersteiner rosettes surround a hyaluronidase
resistant and mucopolysaccharide
b. Homer Wright rosettes may also be found in
medulloblastoma and neuroblastoma
d. fleurettes represent the least differentiated tumour
e. trilateral tumour has a better diagnosis
2. Cytomegalovirus infection:
a. is diagnosed by intramitochondrial inclusions of infected
cells
b. in utero results in congenital deformities in 8-% of cases
c. in an adult is commonest in AIDS and presents with
retinal necrosis and haemorrhage
d. causes deafness, choroiditis and cerebral calcifications
e. is caused by DNA herpes virus and responds to
acyclovir
3. The CT scan findings in thyroid ophthalmopathy are:
a. enlargement of extraocular muscle bellies
b. enlargement of tendons of extraocular muscles
c. enlargement of lacrimal gland
d. thickening of optic nerve
e. medial bowing of lacrimal papyracea
4. In radiation and thermal burns:
a. radiation therapy to the paranasal sinuses or pituitary
lesions exposes the optic nerves to direct ionising
radiation
b. optic nerve radionecrosis occurs within 3 years of
treatment
c. thermal burns of the body can cause optic neuropathy
d. thermal burn optic neuritis is due to septicaemia or
circulatory failure
e. the optic nerve is more resistant than lens to radiation
5. In the pharmacology of anti-glaucoma drugs:
a. pilocarpine reduces production of aqueous by exerting
an inhibitory action on the ciliary epithelium
b. sympathomimetics reduce intraocular pressure by
increasing uveal scleral outflow
c. carbachol increases aqueous outflow via the trabecular
meshwork thereby lowering intraocular pressure
d. pilocarpine induced miosis begins 2-10 minutes after
instillation and lasts 4-8 hours
e. echothiophate iodide causes accommodation spasm,
cataractogenciity, iris cysts and retinal detachment
as
side-effects
6. Optic nerve glioma:
a. is more common in children than in adults
b. originates from the myelin sheath of the optic nerve
fibres
c. causes erosion of the optic foramen margin which is
demonstrable radiologically
d. causes loss of vision early
e. causes axial proptosis
7. Advantages of cryotherapy over diathermy include:
a. cryotherapy causes little or no scleral damage
b. cryotherapy shrinks the sclera thus facilitating closure
of the drainage site
c. cryotherapy does not force fluid from the eye thus
maintaining a reasonable intraocular pressure
d. cryotherapy can be safely applied over staphylomatous
sclera
e. cryotherapy causes no damage to the vortex veins or
ciliary arteries
8. Complications of retinal detachment operations include:
a. strabismus
b. refractive error
c. macular pucker
d. anterior segment necrosis
e. angle closure glaucoma
9. Regarding buckles:
a. encirclage reduces vitreous traction in the eye
b. scleral dissection is required in explants
c. encirclage is indicated when there is evidence of
proliferative vitreoretinoapthy
d. an encirclage can be used if no holes are found on
examination
e. maximal reduction of vitreous traction can be achieved
only if the encircling band constricts the vitreous
base.
10. Pseudomembranes are produced in:
a. gonorrheal ophthalmia
b. pneumococcal conjunctivitis
c. meningococcal conjunctivitis
d. Stevens-Johnson syndrome
e. herpes simplex conjunctivitis