1 Flashcards

1
Q

Superior rectus action

A

elevatio, adduction, intorsion

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2
Q

Inferior rectus action

A

depression, adduction, extorsion

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3
Q

Superior oblique action

A

intorsion, depression, abduction

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4
Q

Inferior oblique action

A

extorsion, elevation, abduction

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5
Q

Lateral and medial orbital walls

A

45 st

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6
Q

Orbital axis

A

22.5 st

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7
Q

Vertical recti angle

A

23 st

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8
Q

Oblique muscles angle with the visual axis

A

51 st.

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9
Q

Convergence

A

15-20 for distance and 25 for near

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10
Q

Divergence

A

6-10 for distance and 12-14 for near

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11
Q

Vertical

A

2-3

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12
Q

Cyclovergence

A

8

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13
Q

Surgery in restrictive myopathy

A

Recession of the inferior and/or medial recti

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14
Q

AC/A ratio - definition

A

amount of convergence in prism diopters (Δ) per dioptre (D) change in accommodation

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15
Q

AC/A ratio - normal value

A

3-5 Δ

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16
Q

Sherrington law…

A

of reciprocal innervation (to the antagonist)

17
Q

Yoke muscles

A

contralateral synergist. produce conjugate ocular movements

18
Q

Hering law…

A

of equal innervation. during any conjugate eye movements, equal and simultaneous innervation flows to the yoke muscles