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Anatomy > Eye > Flashcards

Eye Flashcards

1
Q

What is the anterior chamber filled with?

A

Aqueous humor

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2
Q

What is the conjunctiva?

A

Mucous membrane that covers front of eye and lines eyelids

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3
Q

What are the functions of the conjunctiva?

A

Lubricates eye

Immune surveillance - prevents microbe entry

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4
Q

What is the function of the sclera?

A

Protect the eye

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5
Q

What is the function of the iris?

A

Control the diameter of the pupil - amount of light that reaches retina

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6
Q

What is the nerve supply to circular muscle of iris?

A

Short ciliary nerves

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7
Q

Which cranial nerve do the short ciliary nerves travel along?

A

Oculomotor

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8
Q

What is the nerve supply to the radial muscle of iris?

A

Long ciliary nerves

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9
Q

Which cranial nerve do the long ciliary nerves travel along?

A

Opthalmic

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10
Q

What nerve supplies the ciliary muscle in the ciliary body?

A

Short ciliary nerve

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11
Q

How does contraction of ciliary body affect vision?

A

Short range focus - lens more spherical

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12
Q

How is the aqueous humor reabsorbed?

A

Anterior chamber -> trabecular network -> Schlemm’s canal -> episcleral veins

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13
Q

Which eye disease is associated with problems of aqueous humor drainage?

A

Glaucoma

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14
Q

What is the function of the choroid layer of the eye?

A

Provides oxygen/nourishment to outer layers of retina, limits uncontrolled reflection in eye

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15
Q

What two layers is the retina made up of?

A

Outer pigment layer

Multi-layered neural retina

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16
Q

What are the three main differences between the function of rods and cones?

A 
Rods:
- Dim light
- Perceive flicker well
- Low acuity
Cones:
- Bright light
- Less response to flicker
- High acuity
17
Q

What is the blind spot called?

A

Optic disc/papilla

18
Q

Why is the blind spot blind?

A

No photoreceptors

19
Q

What is the macula lutea?

A

Yellow pigmented zone

20
Q

What is the fovea?

A

Centre of the macula lutea that’s specialised for visual acuity

21
Q

How is the fovea specialised?

A

Only contains cones, no blood vessels to distort image

22
Q

Which layers of the retina does the uveal circulation supply?

A

Outer and middle layers of retina

23
Q

Which layer of the retina does the retinal circulation supply?

A

Inner layer of retina

Anatomy (15 decks)

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