Retina And Blood Flow

Question 1

What are the layers of the retina and their blood supply?

Answer 1

Retina layers:

• ILM
• NFL
• GCL
• IPL
• INL
• OPL
• ONL
• ELM
• PHOTORECEPTOR
• RPE

Bottom 4 layer- rpe, photo,elm,onl=choroid blood supply

Other layers the blood is given from the central retinal artery

Question 2

What are the layers of the artery?

Answer 2

Tunica external 
Tunica media 
Tunica intima (internal)

Question 3

How does blood travel to the ONH?

Answer 3

Blood travels via the internal carotid artery and goes to the ophthalmic artery and then the blood is supplied to the central retinal artery which supplies the ONH

Question 4

What does an artery divide into?

Answer 4

Artery-arteriole-capillaries

Question 5

What is the job of a vein?

Answer 5

Carry deoxygenated blood back to the heart (no oxygen left so going to heart to get more)

Question 6

What is the job of an artery?

Answer 6

Carry oxygenated blood to the tissues

Question 7

Explain the drainage via the veins into the circulation?

Answer 7

Blood from capillaries go into the venules which travel to the central retinal vein which then gives blood back into the circulation via the cavernous sinus

Question 8

Explain an AV crossing

Answer 8

This is where an artery goes over a vein. 70% of arteries going over veins but it’s rare for veins to go over arteries but definitely possible