05/03/2023

MUSCLES OF

THE EYE

BY Ashish chaudhari

RA1421010010001

MUSCLES OF THE EYE

BYASHISH CHAUDHARI

B.OPTOM ii

1Muscles of the eye

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Introduction

Muscles of the eye gives support and mainly involves in the movement of the eye and provides better visual system.It has two types: intraocular and extra ocular muscles

Gives astonished look

Closing of the eye

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Intraocular muscles Ciliary muscles -helps in accommodation

Sphincter pupillae -constricts pupil

Dilater pupillae -Dilates pupil

IOM changes shape of lens and size of pupil.

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Extraocular muscles(EOM)EOM

Oblique muscles

Superior oblique

Inferior oblique

Recti muscles

Superior rectus

Inferior rectus

Medial rectus

Lateral rectus

LPS

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EOM ORIGIN NERVE SUPPLY

Superior rectus Annulus of zinn Occulomotor nerve

Inferior rectus Annulus of zinn Occulomotor nerve

Lateral rectus Annulus of zinn Abducent nerve

Medial rectus Annulus of zinn Occulomotor nerve

Superior oblique Annulus of zinnvia trochlea

Trochlear nerve

Inferior oblique Maxillary bone Occulomotor nerve

Levator palpebral superiosis

Sphenoid bone Occulomotor nerve

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Blood supply Arteries: Ophthalmic artery(medial and lateral branch), Lacrimal artery,anterior ciliary arteriesVeins: superior and inferior orbital veins

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InsertionThe Recti muscles are inserted into the sclera at the different distances from the limbus forming spiral called Spiral of Tillaux

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Actions of Muscles of the eyeMuscles of eye Functions

Orbicularis oculli closes the eyeLPS elevates the upper lidSuperior rectus Moves up and inInferior rectus Moves down and inLateral rectus Abduction

Medial rectus adduction

Superior oblique Eye moves down and out

Inferior oblique Eye moves up and out

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Fig: Monocular movements of the eye

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Fig: Binocular movements of the eye

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Disorders Amblyopia- partial loss of vision in one

or both eye Diplopia- perception of two images from

single object Strabismus-misalignment of visual axes

of two eyes. Nystagmus- involuntary movement of

the eyeball

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THANK YOU

care me