Remember the muscles of the eye here!

External Ocular Muscles

• Superior Rectus: Moves eye superiorly (up)

• Inferior Rectus: Moves eye inferiorly (down)

• Medial Rectus: Moves eye medially (in towards nose)

• Lateral Rectus: Moves eye laterally (out)

• Superior Oblique: Moves eye down & out ("cheaters muscle")

• Inferior Oblique: Moves eye  up & out ("birdwatchers muscle")

LR6, SO4, R3 

• (LR) Lateral Rectus: Innervated by CN 6 (Abducens nerve)

• (SO) Superior Oblique: Innervated by CN 4 (Trochlear Nerve)

• (R3) "All the rest": Innervated by CN 3 (Oculomotor Nerve)

What muscle has been affected here? 

What muscle has been affected?