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Charis & Ellie vs Ophthamology > Ophthalmology Physiology > Flashcards

Ophthalmology Physiology Flashcards

1
Q

What is presbyopia?

A

Eye has reduced ability to focus on near objects because of age

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2
Q

What is emmetropia?

A

No refractive errpr

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3
Q

What is hypermetropia?

A

Long-sightedness

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4
Q

What is myopia?

A

Short sightedness (eye is larger)

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5
Q

What is astigmatism?

A

Not a perfectly curved lens, leads to blurriness

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6
Q

Name extra-ocular muscles?

A 
Medial rectus (CN III)
Lateral rectus (CN VI)
Inferior rectus (CN III)
Superior rectus (CN III)
Superior oblique (CN IV)
Inferior oblique (CN III)
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7
Q

What muscle and nerve does looking up test?

A

Superior rectus/Inferior oblique

CN III

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8
Q

What muscle/nerve does looking up and latreally test?

A

Superior rectus

CN III

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9
Q

What muscle/nerve does looking laterally test?

A

Lateral rectus

CN VI

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10
Q

What muscle/nerve does looking down and laterally test?

A

Inferior rectus

CN III

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11
Q

What muscle/nerve does looking down test?

A

Inferior rectus/Superior oblique

CN III/CN IV

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12
Q

What muscle/nerve does looking down and medially test?

A

Superior oblique

CN III

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13
Q

What muscle/nerve does looking medially test?

A

Medial rectus

CN III

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14
Q

What muscle/nerve does looking medially and up test?

A

Inferior oblique

CN III

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15
Q

Where are cones mainly situated?

A

Fovea

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16
Q

Rods are not where?

A

Fovea

17
Q

What produces the aqueous humour?

A

Ciliary body

18
Q

What is the usual intra-ocular pressure normally?

A

<21mmHg

19
Q

What is consensual response?

A

Light shining in on eye causing constriction of the pupil (direct response) and in the other eye (consensual response) so both eyes contract

20
Q

What does PS innervation to the pupil cause?

A

Constriction

21
Q

What type of drugs constrict the pupil?

A

Miotics

eg pilocarpine

22
Q

What does sympathetic innervation cause?

A

Dilation

23
Q

Which type of drugs dilate pupil?

A

Mydriatics

eg tropicamide, atropine

24
Q

What is definition of keratitis?

A

Infection of cornea

25
Q

What is endopthalmitis?

A

Infection of the entire eye

26
Q

Corneal reflex is?

A

Process of blinking

27
Q

Nerves involves in afferent limbs of corneal reflex?

A

CN V1 Branches

CN V to pons

28
Q

Efferent limbs of corneal relfex nerves?

A

CN VII

Charis & Ellie vs Ophthamology (40 decks)

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