Download - Eye Movement
EPICANTHUS-TELECANTHUS-HYPERTELORISM
Telecanthus is often associated with many congenital disorders such as Down syndrome, fetal alcohol syndrome, Cri du Chat syndrome, Klinefelter syndrome, Turner syndrome, Ehlers-Danlos syndrome
THE BONEY ORBIT AND EYE ALIGNMENT
ORBITAL ANATOMY
EXTRAOCULAR MUSCLES AND THEIR FUNCTION
Medial rectus -adductionLateral rectus -abductionSuperior rectus-elevation, adduction, & intortionInferior rectus-depression, adduction, & extortionSuperior oblique –depression, abduction, & intortionInferior oblique-elevation, abduction, & extortion
SIN IS RADICAL: MNEUMONICS CAN BE FUN
• The vertical recti and the oblique muscles are also called cyclo-vertical muscles.• Both superior cyclovertical muscles are intorters and inferior cyclovertical muscles are
extorters
• SIN= superior muscles are intorters• vertical actions are opposite; the superior oblique is a depressor and the inferior oblique is
an elevator.
• RAD=Recti are ADductors• The RAD mnemonic is useful to recollect that Recti are ADductors but • best efficient and tested in abducted position • it is vice-versa for the oblique muscles
MESIAL RECTUS
LATERAL RECTUS
SUPERIOR RECTUS
INFERIOR RECTUS
SUPERIOR OBLIQUE
INFERIOR OBLIQUE
RIGHT EYE MOVEMENTS
CONVERGENCE
CONVERGENCE AND ACCOMMODATION
• Convergence• Bilateral mesial rectus contraction
• Pupillary Constriction• Lens Accommodation
• Ciliary muscles contract to decrease tension on the zonules
MADDOX RED ROD