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NAT > EYE > Flashcards

EYE Flashcards

1
Q

give the three layers of the eyeball

A 
FIBROUS TUNIC / LAYER (outermost structure)
VASCULAR TUNIC / LAYER (inner structure)
SENSORY LAYER (innermost structure)
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2
Q

this layer is Abundant in blood vessels

A

VASCULAR TUNIC / LAYER (inner structure)

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3
Q

this part of the eye contains

  • Dark pigment (melanin)
  • Prevents scattering of light
  • makes sure that light reaches the retina
A

CHOROID

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4
Q

this the curved structure of the eye, facilitates light refraction/bending

A

CORNEA

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5
Q

shapes your eyeball, protects the inner layers of the eye

it is white in color

A

SCLERA

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6
Q

between ora serata and retina

  • produces melanin
  • helps in contracting and relaxing the lens (far and near sight)
A

CILIARY BODY

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7
Q

literally means rainbow
colored portion of the eye
regulates/adjust light that enters
between cornea and ciliary process

A

IRIS

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8
Q

what are the two layers of the retina

A
  • pigmented layer- prevent scattering of the light

- neural layer- nerve cells/neurons

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9
Q

this part creates images and has two layers

photoreceptor layer

A

RETINA

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10
Q

CREATES AN IMAGE AS WE LOOK AT IT

A

PHOTORECEPTOR LAYER - CONE AND ROD

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11
Q

HOW DOES THE RETINA CREATE AN IMAGE

A

THROUGH LIGHT REFRACTION AND THE OPTIC NERVES

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12
Q

PHOTORECEPTOR CAN BE BRKOEN DOWN INTO TWO

A

cone and rod

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13
Q

this part of the photoreceptor layer is

  • central
  • colored vision
  • colorful
A

CONE

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14
Q

this part of the photoreceptor

  • edge/lateral/ peripheral
  • gives sight in dark places
  • night vision
  • black
A

ROD

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15
Q
  • Interprets image constructed by the retina
  • Nerves from bipolar cell are transmitted to the horizontal cell.
  • Nerves from horizontal nerve to the optic nerves.
  • Optic nerves will be send to the brain for it to be interpreted.
A

BRAIN

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16
Q
  • Abundant in photo receptors but most of them are cones particularly
  • High vision since it has a lot of cones
  • Clearest & sharpest vision
  • optic disc
A

FOVEA CENTRALIS

17
Q
  • ‘blind spot’
  • The opposite of Fovea Centralis
  • No light accepted
  • No photo receptors
A

OPTIC DISC

18
Q

2 TYPES OF FUILD IN THE EYE

A

AQUAEOUS HUMOR

VITREOUS HUMOR / BODY

19
Q

THIS FLUID IS

  • Avascular
  • Clear in color
  • Near the lens and cornea
  • Anterior to lens
A

AQUAEOUS HUMOR

20
Q

THIS FLUID IS

  • Posterior to lens
  • Gives shape to the eye
  • Prevent collapse to eye
A

VITREOUS HUMOR / BODY

21
Q

name 6 extrinsic eye muscles

A 
superior rectus
lateral rectus
superior oblique
medial rectus
inferior rectus
inferior oblique
22
Q

this eye muscle allows upward movement

A

superior rectus

23
Q

this eye muscle allows outward movement

A

lateral rectus

24
Q

this eye muscle allows outward and downward movement

A

superior oblique

25
Q

this eye muscle allows inward movement

A

medial rectus

26
Q

this eye muscle allows downward movement

A

inferior rectus

27
Q

this eye muscle allows outward and upward

A

inferior oblique

NAT (6 decks)

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