Pathology of the Eye Flashcards Preview

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Flashcards in Pathology of the Eye Deck (11):
1

What is the medical term for short-sightedness?

Myopia

2

In myopia, where is the image focussed?

In front of the retina

3

What is hyperopia/hypermetropia?

Long sightedness

4

Where is the image focussed in hyperopia?

Image focussed behind the retina

5

What is presbyopia?

Far sightedness due to age-related changes of the lens

6

What is glaucoma caused by?

Raised intraocular pressure because outflow of aqueous humour is blocked

7

What produces aqueous humour and where does it drain into?

Produced by the ciliary process
Drains into the scleral venous sinus via a trabecular meshwork

8

Movements of the lens for near vision?
Innervation?

Accommodation
-parasympathetic activity in oculomotor nerve causes sphincter-like contraction of ciliary muscle making the lens more globe-like/fatter

9

Movement of the lens for far vision?
Innervation?

No parasympathetic activity to ciliary muscles so lens is stretched, making it flatter

10

What is cataracts?

Clouding of the lens

11

Function of vitreous humour?

Holds the retina in place