1 Flashcards
Superior rectus action
elevatio, adduction, intorsion
Inferior rectus action
depression, adduction, extorsion
Superior oblique action
intorsion, depression, abduction
Inferior oblique action
extorsion, elevation, abduction
Lateral and medial orbital walls
45 st
Orbital axis
22.5 st
Vertical recti angle
23 st
Oblique muscles angle with the visual axis
51 st.
Convergence
15-20 for distance and 25 for near
Divergence
6-10 for distance and 12-14 for near
Vertical
2-3
Cyclovergence
8
Surgery in restrictive myopathy
Recession of the inferior and/or medial recti
AC/A ratio - definition
amount of convergence in prism diopters (Δ) per dioptre (D) change in accommodation
AC/A ratio - normal value
3-5 Δ
Sherrington law…
of reciprocal innervation (to the antagonist)
Yoke muscles
contralateral synergist. produce conjugate ocular movements
Hering law…
of equal innervation. during any conjugate eye movements, equal and simultaneous innervation flows to the yoke muscles
