OCT revision Flashcards

1
Q

what does the OCT of the vitreous normally look like?

A

black but may look cloudy or vitreous may be visible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is asteroid hylosis

A

accumulation of calcium/ lipid globules suspended in the vitreous
- can be picked up with the ophthalmoscope
- can appear as highly reflective bodies on OCT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what do you look for in the OCT of central retina?

A

areas of hyper or hypo reflectivity

intra or sub retinal fluid

Specific layers that may be involved

The thickness and distribution of individual layers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is seen on OCT with drusen/ AMD

A

RPE and Bruch’s membrane doesn’t look smooth and regular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is seen on OCT of wet AMD

A

Neovascular membrane and serous detachment of surrounding retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is and how does Cystoid macular oedema look on OCT?

A

Leakage of capillaries and accumulation of fluids into the inter cellular spaces

  • Can occur as complication of cataract surgery, diabetes, posterior uveitis
  • seen as multiple circular cystic spaces in the retina on OCT
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is central serous retinopathy?

A

fluid or serious detachment of the retina

due to leakage of fluid from the choroid through small breaks in RPE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is epiretinal membrane

A

thin sheet of scar tissue that develops on the surface of the retina

can cause visual distortion

puckering of central retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is a macular hole with traction

A

a shrinkage of the vitreous which leads to a macular hole

a macular hole with traction can lead to a full thickness macular hole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what are hard exudates and how are they seen on OCT?

A

leakage of lipids from retinal capillaries, usually a complication of diabetes and hypertension

seen as highly reflective areas on OCT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is retinoschisis

A

splitting of layer within the sensory retina on outer plexiform layer

quite visible on OCT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly