Ocular Movements Ductions Versions Vergences Eye Movements

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Follow me on telegram • t.me/optometryacademyak • Facebook page link • / optometryacademy • Ductions include the following movements: • 1. Adduction • 2. Abduction • 3. Elevation / Supraduction • 4. Depression / Infraduction • 5. Intorsion • 6. Extorsion • Adduction: when An inward movement of the eye towards the nose, a • medial rotation along the vertical axis is known as adduction. • Abduction: when An outward movement, a lateral rotation along the • vertical axis is known as abduction. • elevation :An upward movement or elevation along the horizontal axis is called elevation. • depression: When the eye moves down (depression) along the • horizontal axis is termed as depression. • Incycloduction (Intorsion): When the eye makes a rotatory • movement along the anteroposterior axis such that the superior • pole (12 O’clock point) rotates towards the nose is known as intorsion. • Excycloduction (Extorsion): When the eye rotates in a manner that • the 12 O’clock point rotates away from the nose is termed as extorsion. • Versions (Conjugate Movements) • These are synchronous and symmetric movements of both eyes in • the same direction. These are classified according to the direction of • binocular movements as follows: • 1. Dextroversion: When both eyes are turned to the right. It is affected • by a simultaneous contraction of right lateral and left medial rectus • muscle. • 2. Levoversion: When both eyes are turned towards left by contraction • of left lateral and right medial rectus. • 3. Supraversion: when both eyes are rotated straight up. It is affected • by a simultaneous contraction of superior rectus and inferior oblique • of both eyes. • 4. Infraversion: When both eyes are turned straight down, and is • caused by a bilateral contraction of inferior rectus and superior • oblique muscles. • 5. Dextrodepression: When both eyes are turned down and to the • right. It is caused by a simultaneous contraction of right inferior • rectus and left superior oblique. • 6. Dextroelevation: When both eyes are tured up and to the right. It • is caused by a simultaneous contraction of right superior rectus and • left inferior oblique. • 7. Levoelevation: When both eyes are turned up and to the left , a • position achieved by a simultaneous contraction of left superior • rectus and right inferior oblique. • 8. Levodepression: When both eyes are turned down and to the left . • This position is brought about by a simultaneous contraction of left • inferior rectus and right superior oblique. • 9. Dextrocycloversion: When the eyes rotate along the anterioposterior • axis so that the superior pole (12 O’clock point) rotates to the right • side. This movement is brought about a simultaneous contraction • of inferior rectus and inferior oblique muscle of the right eye, and • superior rectus and the superior oblique of left eye. • 10. Levocycloversion: A movement just opposite of dextrocycloversion. • • VERGENCES • Vergences are disjugate, synchronous and symmetric movements of • both eyes in the opposite direction. Depending upon the direction of • movement vergences may be described as follows: • 1. Convergence: It is a synchronous inward movement of both eyes • brought about by a simultaneous contraction of both medial recti. • 2. Divergence: It is a simultaneous and synchronous outward movement • of both eyes brought about by a simultaneous contraction of both • lateral recti. • • Chapters • 00:00 Starts • 00:13 Intro • 00:34 Ductions • 01:48 Versions • 03:50 Vergences • 05:48 Ends • • #optometryacademy #optometrist #optometry #AkleshKumar #ophthalmologist #mcq #clinical #questions #sclera #scleritis #NEET #ulcer #Photophobia #ophthalmology #vision #eye #eyedoctor #ophthalmologist #optometry #eyes #eyesurgeon #eyecare #astigmatismo #optometrist #medicine #cataract #miopia #ceratocone #doctor #eyeballs #halloween #eyes #art #creepy #eyeball #eyeroll #scary #whiteeyes #eye #crazyeyes #creepygirl #prettygirlsdoingeyetricks #gothgirl #creepygirlsdoitbetter #artist #whiteeyedgirls #creepyeyes #girlswithwhiteeyes #spooky #stayweird #girlswhocanrolltheireyes #scaryeyes #girlswithpiercings #livingdeadgirl #spookygirl #everydayishalloween #deadchicksarecool #weirdeyes #bhfyp

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