Muscles of the eye

Muscles of the eye: contents_introduction,mainly parts of the eye and their actions

1. MUSCLES OF THE EYE BY Ashish chaudhari RA1421010010001 MUSCLES OF THE EYE BY ASHISH CHAUDHARI B.OPTOM ii 2/13/2016 1 Muscles of the eye

2. 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 2/13/2016 2 Muscles of the eye Gives astonished look Closing of the eye

3. Intraocular muscles Ciliary muscles - helps in accommodation Sphincter pupillae - constricts pupil Dilater pupillae - Dilates pupil IOM changes shape of lens and size of pupil. 2/13/2016 3 Muscles of the eye

4. Extraocular muscles(EOM) 2/13/2016 4 Muscles of the eye

5. 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 zinn via trochlea Trochlear nerve Inferior oblique Maxillary bone Occulomotor nerve Levator palpebral superiosis Sphenoid bone Occulomotor nerve 2/13/2016 5 Muscles of the eye

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7. Blood supply Arteries : Ophthalmic artery(medial and lateral branch), Lacrimal artery,anterior ciliary arteries Veins : superior and inferior orbital veins 2/13/2016 7 Muscles of the eye

8. Insertion The Recti muscles are inserted into the sclera at the different distances from the limbus forming spiral called Spiral of Tillaux 2/13/2016 8 Muscles of the eye

9. Actions of Muscles of the eye Muscles of eye Functions Orbicularis oculli closes the eye LPS elevates the upper lid Superior rectus Moves up and in Inferior rectus Moves down and in Lateral rectus Abduction Medial rectus adduction Superior oblique Eye moves down and out Inferior oblique Eye moves up and out 2/13/2016 9 Muscles of the eye

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11. Fig: Monocular movements of the eye 2/13/2016 11 Muscles of the eye

12. 2/13/2016 Muscles of the eye 12 Fig: Binocular movements of the eye

13. 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 2/13/2016 Muscles of the eye 13

14. THANK YOU care me 2/13/2016 14 Muscles of the eye