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EENT > Eye-General > Flashcards

Eye-General Flashcards

1
Q

The fluid in the anterior portion of the eye (anterior to lens) is called?

A

Aqueous humor

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2
Q

The fluid in the posterior/central portion of the eye (posterior to lens) is called?

A

Vitreous humor

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3
Q

The “white” of the eye is referred to as?

A

Sclera

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4
Q

Name all parts/layers of the eye from external to internal/posterior, in order:

A
  1. Cornea
  2. Anterior chamber
  3. Iris
  4. Pupil
  5. Posterior chamber
  6. Lens
  7. Vitreous humor
  8. Retina
  9. Choroid
  10. Sclera
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5
Q

Aqueous humor is produced by what?

A

Ciliary body

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6
Q

The muscle in the eyelids is?

A

Orbicularis oculi

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7
Q

The main sensory nerve of the eye is?

A

Optic (CN II)

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8
Q

The 3 cranial nerves providing muscular innervation to those that move the eye are?

A

CN III, IV, VI

Oculomotor, trochlear, abducens

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9
Q

The trochlear nerve (CN IV) innervates what eye muscle?

A

Superior oblique

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10
Q

The abducens nerve (CN VI) innervates what eye muscle?

A

Lateral rectus (ABductor)

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11
Q

The “point of central focus” in the eye is known as?

A

Fovea centralis

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12
Q

The fovea centralis is inside what structure?

A

Macula

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13
Q

The primary visual cortex is located in what lobe of the brain?

A

Occipital lobe

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14
Q

The most common vision problem?

A

Errors of refraction (difficulty focusing on far or near objects)

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15
Q

Refraction means _______

A

Bending of light

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16
Q

Myopia

A

Nearsightedness (can only see close objects clearly)

17
Q

Farsightedness

A

Hyperopia (inability to see close objects clearly)

18
Q

In myopia (nearsightedness), the light is focused ____ (anterior/posterior) to the retina, while in hyperopia it is focused _____

A

Anterior, posterior

19
Q

Farsightedness (hyperopia) caused by loss of elasticity of the lens, occurring typically in middle and old age

A

Presbyopia

20
Q

A defect in the eye or the lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus. (Eye isn’t perfectly round)

A

Astigmatism

EENT (10 decks)

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