ophthalmology quiz
retinitis pigmentosa :
a) it is usually bilateral
b)usually hereditary.
c)causes cataract
d)causes tunnel vision.
e)related to usher syndrome .
answers all are true
2) regarding retinoblastoma :
a)amaurotic cat reflex is seen .
b)divergent squint is the most common manifestation.
c)pseudorosette is specific feature .
d)pseudohypopyon is usual manifestation
e)it is usually calcified .
answers amaurotic cat reflex yellow or white pupillary reflex classically noted by parents convergent squint is seen and the second most common manifestation of disease .neither pseudorosette nor homer wright rosette are specific of disease .specificity is related with 2 F flexner rosette and fleuters.
pseudohypopyon is the rare maifestation of the disease .in 75% cases calcification is seen on x ray .
3) Central retinal vein occlusion:
a)most common cause in elderly is diabetes .
b)in younger age group facial erysiplas can do it
c)90 day galucoma can occur .
d) loss of vision is not as rapid as in retianl artery occlusion
e)typical fundual picture is thunder blood fundus.
answers all are true .
4) regarding management of retinoblastoma :
a) in stage 1 @ 2 enuclation is done
b)in stage exentration of orbit is done.
c)cobalt radiotherapy.
d)chemotherapy based on cyclophosphamide vincristine and adrimycin.
e)photocoagulation by argon laser.
answer all are true best mneumonic is ERCP ENCULEATION EXENTRATION RADIOTHERAPY CHEMOTHERAPY CRYOTHERAY PHOTOCOAGULATION.
5)REGARDING ELECTRORETINOGRAM
A) there are three wave pattern .
b) a wave is negative .
c) c wave is positive deflection.
d) b wave is generated from the neural layer .
e) show charactersitic pattern in retinitis pigmentosa.
answer all are true
best way to study it is that is like the ecg as ecg have three wave pattern p qrs and t it also have three waves a, b, c a wave is like the q of ecg i.e. negative the rest two are positive a wave is formed from the rods and cones b waves is from the neural layer and c is from pigment layer .
Reply With Quote
Bookmarks