Eye trauma: has the lens moved?

Question 1Where is the normal lens on a closed-eyelid scan?

1. aOutside the globe
2. bJust behind the iris, at the front of the globe
3. cAgainst the posterior wall
4. dWithin the optic nerve sheath

Question 2What does the normal lens look like?

1. aA bright line with a shadow
2. bAn oval with bright front and back edges and a dark centre
3. cA floating membrane
4. dA round bright ball with a comet tail

Question 3Where does a traumatically dislocated lens most often go?

1. aInto the optic nerve
2. bInto the eyelid
3. cBack into the vitreous, often lying on the posterior wall
4. dInto the orbital fat

Question 4When should you not perform ocular ultrasound?

1. aAfter any fall
2. bWhen globe rupture is suspected
3. cWhen the eyelid is closed
4. dWhen the patient can look straight ahead

Question 5How should you scan an intact injured eye?

1. aWithout gel, through the open eye
2. bWith an abdominal preset at full output
3. cPlenty of gel, the hand resting on the face and almost no pressure
4. dFirm pressure to improve contact