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Science > Part Of The Eye > Flashcards

Part Of The Eye Flashcards

1
Q

The hole in the iris that light passes through to reach the retina

A

Pupil

Black hole

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2
Q

Makes pupil large when light is dim, small when light is bright

A

Iris

Coloured part of eye

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3
Q

Allows the eye to move which provides vision in various directions

A

Muscles

Red soft/hard

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4
Q

Layer surrounding the eyeball which cushions and protects it from damage

A

Fat

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5
Q

Carries nerve signals to the brain

A

Optic nerve

Looks like tube

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6
Q

The tough cover of the eyeball that forms the white of the eye

A

Sclera

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7
Q

A layer found between the sclera and the retina that contains many blood vessels which bring nutrients and oxygen to the eye and remove wastes

A

Choroid

Black lining

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8
Q

The area where the image is produced and converted into nerve signals and is sensitive

A

Retina

Inner thin layer

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9
Q

Found in the centre of the eye which helps maintain the eyes shape and plays a small role in focusing light on the retina

A

Vitreous humour
(Jelly like fluid
Clear lens)

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10
Q

Helps focus light on the retina

A

Lens

Like contact lens

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11
Q

Helps focus light on the retina

A

Cornea

Clear bubble

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12
Q

Found between the cornea and the iris which maintains the shape of the front of the eye and plays a small role in focusing flight

A

Aqueous humour

Watery fluid

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13
Q

In the area where the optic nerve and blood vessels connect to the retina, there are no rods or cones

A

Blind spot

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14
Q

Control thickness of the lens to adjust for near and far objects

A

Ciliary muscles

Reddish band

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15
Q

Attach the ciliary muscles to the lens which allow the lens to change shape and focus light on the retina

A

Suspensory ligaments

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16
Q

Sensitive to the level of light and detect dim light

A

Rods

17
Q

Sensitive to colour. Detect bright light and allow us to see colour and detail

A

Cones

18
Q

Lens and cornea lose their elasticity and can’t change their shape easily

A

Presbyopia

19
Q

Doesn’t refract light enough

A

Hyperopia

20
Q

When focusing mechanisms refract light too much

A

Myopia

21
Q

Image formed in front of retina and not clear

A

Myopia

22
Q

Eyeball shortened from front to back

A

Hyperopia

23
Q

Caused when light is too long form front to back

A

Myopia

24
Q

Inability to focus on either nearby or far away objects

A

Presbyopia

25
Q

Difficulty seeing objects close up or in focus. Can see distant objects clearly

A

Hyperopia

26
Q

Can see nearby things clearly but can’t focus on distant objects

A

Myopia

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