REVISION OF EYE ANATOMY Flashcards Preview

OPHTHALMOLOGY > REVISION OF EYE ANATOMY > Flashcards

Flashcards in REVISION OF EYE ANATOMY Deck (11)
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1
Q

What are the three layers of the eye?

A

Fibrous layer - cornea and sclera
Vascular layer (uveal tract) - iris, ciliary body, choroid
Neurosensory layer - Retina

2
Q

What is the name for the area of concentrated levels of cones rather than rods in the retina?

A

Fovea within the macula

3
Q

When examining the posterior segment of the eye, what must you note about the optic disc?

A

Colour
Cup
Contour

4
Q

What pathology might a pale optic disc indicate?

A

Optic atrophy (death of the retinal ganglion cell axons that comprise the optic nerve)

5
Q

When looking at the back of the eye, which vessels are the thicker ones?

A

The veins

6
Q

When looking at the back of the eye, which vessels pulsate?

A

The veins - spontaneous venous pulsation

7
Q

Where in the eye is aqueous humour produced?

A

Ciliary body behind the iris

8
Q

Where is the anterior chamber of the eye?

A

In front of the iris. Aqueous humour flows through the pupil into the anterior chamber.

9
Q

Where is the posterior chamber of the eye?

A

In front of the lens behind the iris.

10
Q

Where is aqueous humour drained out of the anterior chamber?

A

90% Via the trabecular meshwork through the canals of Schlemm, which sit at the base of the iris, and then back into the circulation

10% via the uveoscleral outflow - through the tendons of the ciliary muscle and then reabsorbed by the sclera.

11
Q

How aqueous humour produced?

A

Secretion via active transport (75%)

Ultrafiltration (25%)