Eye

Question 0

Trauma

Answer 0

Rupture or dislocation of lens

Gas in anterior chamber

Question 1

Cataracts

Answer 1

Echoes in the normally anechoic lens

Thickened echogenic posterior lens wall

Question 2

Vitreous posterior detachment

Answer 2

Posterior vitreous capsule detaches from the underlying retina
The detached echogenic vitreous swirls away from the optic nerve during dynamic scanning

Question 3

Vitreous haemorrhage

Answer 3

Result of trauma
Fresh haemorrhage may not be visible or seen as a relatively homogenous increase in echogenicity stranding and scarring or a fluid-fluid level within the orbit

Question 4

Retrohyaloid haemorrhage

Answer 4

Haemorrhage behind vitreous displaces vitreous gel and capsule forward
With dynamic scanning, the homogenously echogenic blood swirls to and fro but is confined between the retina and the capsule

Question 5

Retinal detachment

Answer 5

Can be partial or total
Retina remains attached at the optic nerve head and near the ciliary bodies
Membranous opacity may be mobile or fixed during dynamic scanning

Question 6

Choroid detachment

Answer 6

Choroid balloons into vitreous in a biconvex manner and can be seen in all planes of imaging
Differentiated from retinal detachment by its posterior wall attachment some distance away from the optic nerve

Question 7

Malignant Melanoma

Answer 7

Rounded heterogenous mass
Do not move with dynamic scanning
U/S to assess AP measurement and location in relation to optic nerve head
Often causes retinal detachment

Question 8

Retinoblastoma

Answer 8

Most common primary intel ocular malignancy of childhood
Mass within the orbit containing calcification
May be bilateral
May be associated with retinal detachment