Past MRCOphth/MRCS questions: 15
1. Chemical burns:
a. acid solution readily penetrate the corneal epithelium 
    but are repelled by the lipoprotein cell walls of the 
b. alkaline corneal burns are less destructive than acid 
c. solutions of alkaline pH readily penetrate and spread 
    deep into the corneal stroma and into the anterior 
d. acid burns of the cornea are usually sharply 
    demarcated because of the buffering action fo the 
e. refrigerant and bleach are common causes of alkali 

2. The Kayser-Fleischer ring:

a. consists of copper deposits in Bowman's membrane
b. gives a green-brown, grey, orange or brown 
    appearance tot he corneal periphery
c. initially appears as a thin crescent at the 3 and 9 
    o'clock positions of the cornea
d. may regress with D-penicillamine therapy
e. cannot result from copper intraocular foreign bodies

3. Cogan's syndrome is:

a. a form of acquired syphilis
b. characterized by deafness
c. occasionally associated with lupus erythematousus
d. occasionally associated with polyarteritis nodosa
e. characterized by interstitial keratitis

4. Causes of aqueous tear deficiency:

a. practolol
b. tricyclic anti-depressants
c. facial nerve palsy
d. antihistamines
e. atropine

5. Mucopolysaccharidoses associated with corneal clouding:

a. Hurler
b. Hunter
c. Scheie
d. Morquio
e. Sanfilippo
6. Keratoconus:
a. should be suspected in an adolescent with progressive 
    myopic astigmatism
b. does not exhibit corneal epithelial thinning
c. is accompanied by Bowman's membrane
d. may be associated with Vogt's striae which are fine 
    vertical folds in the deep stroma
e. can be optically corrected with hard contact lenses

7. Causes of chronic conjunctivitis:

a. chlamydial infection
b. cosmetics
c. molluscum contagiosum
d. chronic meibomitis
e. psoriasis

8. Bilateral corneal crystalline deposits may occur in:

a. cystinosis
b. gout
c. monoclonal gammopathy
d. Salzmann's dystrophy
e. Schnyder's dystrophy

9. Indications for a larger donor button in keratoplasty:

a. phakic patient
b. shallow anterior chamber
c. peripheral corneal thinning
d. prior history of uveitis
e. aphakic patient

10. Exclusion criteria for donor cornea:

a. previous intraocular surgery
b. retinoblastoma
c. death of unknown cause
d. bowel cancer
e. Creutzfeldt-Jakob disease
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