Ophthalmoscopy Flashcards Preview

Ophthalmology > Ophthalmoscopy > Flashcards

Flashcards in Ophthalmoscopy Deck (11):
1

How thick is the cornea?

0.5mm

2

What are the layers of the cornea

OUTSIDE

1 Epithelium (several cells thick)

2 Bowman's membrane

3 Stroma (made of collagen)

4 Descemet's membrane

5 Endothelium (1 cell thick, never regrows which maintains dehydration)

ANTERIOR CHAMBER

3

What is the refractive index of the cornea?

40 dioptres

4

What specialist cells does the conjunctiva contain?

mucin-secreting goblet cells

5

What are the layers of the iris?

1) stoma = contains sphincter pupillae muscle and determines colour of iris

2) Pigment epithelium contians a greater amount of pigment and the dilator pupillae

6

What are the functions of the ciliary body?

aqueous secretion

accommodation

influences aqueous outflow

7

What is the function of the retinal pigmented epithelium?

provides

functional and

metabolic

support for the photoreceptors

8

What is the uvea?

The iris, ciliary body, and choroid collectively.

9

What is the membrane called between the choroid and retina?

Bruch’s membrane

10

What is the blood supply to the retina

Central 2/3rds is retinal blood vessels

Outer 1/3 is choroidal blood vessels

11

Why is the optic nerve thicker outside the orbit?

It is myelinated