Test 24
1. The following are true about the Jones' test in a patient with epiphora:
a. it is used to detect functional epiphora

b. it should be performed before syringing of the 
    nasolacrimal system

c. a positive Jones I test suggests either hypersecretion or 
    functional epiphora

d. a positive Jones II test suggests partial blockage below 
    the lacrimal sac

e. Jones II test is not necessary if Jones I test is positive


2. Nuclear lacrimal scintigraphy:
a. is not useful if the nasolacrimal duct is not patient on 

b. uses the same radiotracers as for bone scan

c. uses radioactive iodine as radiotracer

d. required the use of local anaesthesia

e. shows up the canaliculi well

3. Dacryocystography:

a. involves instilling radio-opaque substance into the 
    conjunctival sac

b. should be avoided in acute dacryocystitis

c. is useful in defining the site of obstruction in a 
    regurgitating mucocele

d. can show up lacrimal sac tumour 

e. if the nasolacrimal duct is non-patent, lacrimal 
    scintigraphy should be performed next


4. The following are true about relative afferent pupillary defect:

a. anisocoria is a feature

b. resolution of the defect can occur if the disease process 
    affects the contralateral eye

c. the defect is seen in lesion of the ciliary ganglion

d. the severity of the defect correlates with visual field 

e. it can be graded using a density filter

5. The following are features of ptosis caused by myasthenia gravis:

a. a brief eyelid retraction after a saccade from downward 
    gaze to primary position 

b. improvement of ptosis after sleep

c. improvement of ptosis after applying ice to the lid

d. failure of eyelid to descend on downgaze

e. increased ptosis on maintained upgaze

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