Past MRCOphth/MRCS questions: 4
1. Man with X-linked retinitis pigmentosa:
a. must have an affected mother
b. must have a carrier mother
c. 50% of sons affected
d. daughters must be affected
e. tends to have poor visual prognosis than autosomal 
    dominant type

2. Cerebral hemisphere lesion:

a. homonymous hemianopia
b. bitemporal hemianopia
c. dysphasia
d. focal epilepsy
e. intentional tremor
3. The following are true about botulinum toxin:
a. cannot be used under general anaesthesia
b. can only be used for the horizontal recti
c. ptosis is one of the complications when used for 
d. will develop antibodies in blood
e. the onset of action takes 24 hours
4. Regarding ultrasound biometry:
a. higher frequency gives better resolution
b. wider beam width gives more accurate result than 
    narrower beam width
c. a central fixation target gives more accurate result
d. modern instruments allows 0.01 mm resolution
e. measurements repeated in a pseudophakic patient 
    gives same result as in pre-operative state

5. In ophthalmic ultrasound:

a. lower frequency gives better resolution than higher 
b. sound wave is refracted in the lens
c. highest signal in ocular tissues is from the sclera
d. high internal reflectivity in melanomas
e. will not show up retinoblastoma calcification

6. SF6:

a. is lipid soluble
b. causes posterior subcapsular cataract
c. absorbs nitrogen from vein rapidly
d. will not expand with a mixture of 40% SF6 and 
    60% air
e. no electrophysiological evidence of damage to 

7. With regard to electro-oculogram (EOG):

a. it arises from extraocular muscles
b. its potentials come from retinal ganglion cells
c. its potentials arise from retinal pigment epithelium
d. it is a better test than ERG for Best's disease
e. patients with abnormal ERG usually have abnormal 

8. Optic nerve trauma in head injury:

a. usually involves intracranial portion
b. commonly produces altitudinal defects
c. often complicated by optic atrophy
d. causes contralateral relative afferent pupillary defect
e. visual evoked potential (VET) shows delayed latency

9. Moron's ulcer:

a. is a slowly progressive unilateral disease
b. is usually preceded by a viral prodromal phase
c. begins as a grey peripheral infiltrate which breaks 
    down into a ulcer furrow
d. the margin of the ulcer is infiltrated with monocytes and 
    plasma cells
e. it is similar to corneal melting associated with 
    connective tissue diseases such as rheumatoid arthritis 
    in that the sclera is involved

10. In corneal graft rejection:

a. 90% of immune graft rejection occurs within the first 
b. one ore more pregnancies in the past increases the risk
c. previous grafting in the fellow eye increases the risk
d. one or more blood transfusion in the past increases the 
e. prior to rejection there is an increase in corneal 
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