opthalmology

Question 1

positive Siedel test indicates

Answer 1

corneal injury

Question 2

first line TTT of retrobulbar hematoma

Answer 2

lateral canthotomy + cantholysis (if IOP > 40)

+ IV acetazolamide + IM/IV hydrocortisone

Question 3

which area of the lateral canthal tendon is cut in cantholysis

Answer 3

inferior crus

Question 4

other methods to evacuate retrobulbar hemorrhage include

Answer 4

• Transcutaneous transeptal incision
• Transconjunctival pressure release

Question 5

treatment of lime injury

Answer 5

• remove particles using forceps
• irrigate using NS / RL
  NEVER USE TAP WATER

Question 5

contraindication to ascorbate and citrate in chemical burn

Answer 5

Renal failure
(potential renal toxicity)

Question 6

prevention of symblepharon in chemical injury is achieved by

Answer 6

using a glass shell or sweeping a glass rod in the fornices twice daily.

Question 7

CRAO causes irreversible damage after

Answer 7

90 mins

Question 8

pupil in CRAO

Answer 8

RAPD

Question 9

massaging the pupil in CRAO aims at

Answer 9

dislodging the embolus

Question 10

TTT of GCA

sudden painful loss of vision

Answer 10

immediate administration of steroids (to protect other eye)

Question 11

AAION causes damage to optic nerve dt

Answer 11

inflammation of the short posterior cilial arteries

• Altitudinal visual field defect
• swollen optic disc

Question 12

regarding management of ACG

Answer 12

IOP must be controlled medically before surgery is attempted to avoid the risk of IO hemorrhage

Question 13

most effective drug during the attack of ACG

Answer 13

IV mannitol (1 ~ 2 gm/kg)

Question 14

after the attack of ACG

Answer 14

• if PAS > 50% → filtering surgery
• If PAS < 50 % → laser iridotomy
  + prophylactic iridotomy in the other eye

Question 15

pupil in ruptured globe

Answer 15

Tear-drop / pear shape
points towards the laceration

cover with EYE SHIELD
DO NOT PATCH

Question 16

most common cause of unilateral proptosis in children

Answer 16

orbital cellulitis

Question 17

M/C cause of orbital cellulitis

Answer 17

bacterial rhinosinusitis

Question 18

choice of antibiotics in Orbital cellulitis

Answer 18

• IV / IM
• Ointment
  + ** HOT** foments

Question 19

etiology of 3rd CN palsy

Answer 19

• if pain → posterior communicating artery aneurysm
• if dilated pupil → compression

Question 20

to avoid rebleeding after Hyphema

common on 1st 5 days

Answer 20

anti-fibrinolytic drugs as oral
aminocaproic acid

Question 21

slit-lamp examination in RD

Answer 21

Tobacco dusting (+ve Shaffer sign)

fundus shows loss of red reflex

Question 22

best method to discover corneal FB

Answer 22

Slit-lamp examination after fluorescein staining

Question 23

A foreign body can be localized on the conjunctiva or cornea by

Answer 23

oblique transillumination

Question 24

to discover a foreign body in the superior fornix

Answer 24

double eversion

Question 25

ccc of UV rays

Answer 25

a) Pterygium
b) Senile Cataract.
c) AMD.