Eye Flashcards
Name the 7 bones which form the orbit
Ethmoid Frontal Palatine Sphenoid Zygomatic Maxilla Larimal
What passes through the Optic Foramen
Optic Nerve
Ophthalmic Artery
What passes through superior orbital fissure
Abducens Nerve Trochlear Nerve Occculomotor Nerve Ophthalmic of Cranial Nerve V Ophthalmic Veins
What passes through Inferior Orbital Fissure
Maxillary of Cranial Nerve V
Inferior Ophthalmic Vein
Main contents of Orbit
Eye Extrinsic Ocular Muscles Ligaments optic nerve ophthalmic artery branches Lacrimal apparatus adipose fat
What makes up the outer fibrous layer of the eye
Sclera and Cornea
What makes up the middle vascular layer of eye
Choroid
Ciliary body
Iris
what makes up the inner sensory layer of eye
Retina
what is the name given to the watery fluid in anterior eye
Aqueous Humour
what is name given to gel in posterior segment of eye
vitreous humour
Name the three intrinsic muscles of eye
Ciliaris
Sphincter Pupillae
Dilator Pupillae
Location, Action and Innervation of Ciliaris
Vascular layer around Iris
Accomodation
Parasympathetic
Location, Action and Innervation of Sphincter Pupillae
Pupillary border of of Iris
Narrows Pupil
Parasympathetic
Location, Action and Innervation of Dilator papillae
Outer to inner border of iris
Widens Pupil
Sympathetic
Eye movements are produced by
Extrinsic muscles of Eye
when the top of the eye is rotated towards the nose it is called
Intortion
When the top of the eye is rotated away from nose is it is called
Extortion
How many eye muscles are recti
Four
In addition the elevator of the upper eyelid is also considered as an extrinsic eye muscle even though it has no action on the eyeball itself.
What is this muscles known as?
Levator Palpebrae Superioris
What innervates Levator Palpebrae Superioris
Occulomotor Nerve
Medial rectus of eye function
Adducts Eyeball
lateral rectus of eye function
Abducts Eyeball
inferior rectus of eye function
Depression
Intortion
Extrosion
Superior oblique of eye function
Depression
Intortsion
Elevation
Inferior oblique of eye function
Depression
Adduction
Lat Rotation
Which is the only muscle that does not arise from the posterior aspect of the orbit?
Inferior oblique
What is the function of the suspensory ligament of the eye?
resist posterior pull of recti
Name the branch of the internal carotid artery that supplies the orbit and the eye.
ophthalmic artery
Which foramina in the orbit do the ophthalmic veins pass through to enter into the cavernous venous sinus in the cranial cavity?
superior orbital fissure
Are there any lymphatics in orbit
No
In which part of the orbit does lacrimal apparatus structure lie, medial or lateral?
Lateral
From which cranial nerve does parasympathetic innervation to lacrimal apparatus arise
CN VII
Into which meatus of the nasal cavity does lacrimal apparatus drain (via the nasolacrimal duct)
inferior nasal meatus
