The document discusses the extraocular muscles of the eye. It describes the six extraocular muscles - the four rectus muscles (medial, lateral, superior, inferior) and two oblique muscles (superior, inferior) that control eye movement. It details the origin, insertion, nerve supply and action of each individual muscle. Collectively, these muscles enable movements like elevation, depression, adduction, abduction, intorsion and extorsion of the eyeball. The levator palpebrae superioris muscle is also described, which is responsible for elevating the upper eyelid. Various clinical tests and conditions involving these muscles like strabismus, ptosis and nerve palsies are mentioned.
8. RECTI MUSCLES - Insertion
Inserted into sclera
In front of equator
• Distance from cornea
MR = 5.5mm
IR = 6.5mm
LR = 6.9mm
SR = 7.7mm
5mm
6 mm
8 mm
7 mm
23. Abnormal deviation of eyeball is known as
Squint (Strabismus)
Damage to Abducent nerve - Medial
Squint
Damage to Occulomotor nerve - Lateral
Squint and Ptosis-Dropping of Eyelid
Damage to Trochlear nerve - diplopia
while looking downwards
Medial Squint
Lateral Squint and Ptosis