OCT and VF

Question 1

What colour is fluid in a B scan?

Answer 1

Fluid is always dark, it is hard to differentiate from blood. Blood may give more of a shadow appearance.

Question 2

List the retinal Layers of a B scan from innner to outer

Answer 2

Internal limiting mebrane 
retinal nerve fibre layer 
ganglion cell layer 
Inner plexiform Layer
Inner nuclear Layer
Outer Plexiform layer 
Outer nuclear layer 
external limiting membrane 
photoreceptor layer
RPE
bruch's mebrane 
choriocapillaris 
choroidal stroma

Question 3

What cells are in the IPL?

Answer 3

synapse of ganglion and bipolar cells

Question 4

What cells are in INL?

Answer 4

nuclei of bipolar cells

Question 5

What is a macular cube scan?

Answer 5

Lots of different a scans that make up a b scan

Question 6

what is a radial line?

Answer 6

lots of scans fixated on one point which helps alignment. If a patient struggles to align correctly you may want to use this scan.

Question 7

Circle scan?

Answer 7

RNFL around disc

Question 8

What is a key test to check for early glaucoma or normal tension glaucoma?

Answer 8

GCA

Question 9

How was cystoid macular Oedema appear on macular cube?

Answer 9

raised and will give pink or white indicators. Indicating raised.

Question 10

When does papilloedema appear thin?

Answer 10

Once atrophy occurs.

Question 11

OSCE station VF:

Answer 11

reliability indices, mean and pattern standard deviation, total and pattern deviations, Glaucoma hemifield results.

Question 12

which layer are you first likely to see drusen in a AMD patient?

Answer 12

Bruch’s membrane, outter boarder of the RPE.

Question 13

Central serous chorioretinopathy

Answer 13

Above RPE