Week 1- Science Flashcards
(113 cards)
Name the junction between the cornea and sclera
corneoscelral junction (limbus)
Where is the lacrimal gland located?
superolateral to eye
What are the two components of the fibrous layer of the eye?
Cornea
Sclera
Name the three parts of the uvea
Iris
Ciliary body
choroid
What is the purpose of the choroid?
Nutrition and gas exchange to eye
Which part of the eye is the posterior segment and which is the anterior segment?
anterior- anterior to lens
posterior- behind the lens and contains the vitreous humour
Name the fluid secreted by the ciliary body and name the structures it supplies with nourishment. Into what chamber is the fluid reabsorbed?
Aqueous humour
scleral venous sinus in the iridocorneal angle
Name the branch of the internal carotid artery (enters through carotid canal) which is the main blood supply to the eye. Through which foramen does this pass? Which arteries emerge from this artery to supply the choroid?
Ophthalmic artery
Optic canal
ciliary artery
What is the fundus?
The posterior area surface of the eye where light is focused.
Name the three veins which drain the orbit
superior ophthalmic
inferior ophthalmic
facial vein (valve less vein)
Name the 7 bones that make up the orbit
frontal maxilla zygomatic nasal sphenoid lacrimal ethmoid
What is a blowout fracture?
Fracture of the medial wall and orbital floor
Name the muscle responsible for the closing of the eyelids. Which nerve innervates it?
orbicularis oculi
CN VII
Name the muscle responsible for the opening of the eyelid.
levator palpebrae superioris
What nerve stimulates the lacrimal gland? What vessels drain the lacrimal fluid to the lacrimal sac?
Parasympathetic division of facial nerve
Lacrimal puncta
Name the 7 extraocular muscles
superior, inferior, medial and lateral rectus
superior and inferior oblique
levator palpebrae superioris
How are the extraocular nerves innervated
LR6 SO4 AO3
Lateral Rectus CNVI
Superior Orbital CNIV
All Others CNIII
What provides parasympathetic innervation to the eye?
Ciliary ganglion
What is the conjunctival fornix?
The folds that connect the conjunctival membrane lining the inside of the eyelid to the eye itself
What is the macula and the fovea?
Macula- area of greatest density of cones
Fovea- centre of macula
light from objects in the right visual field is processed by the ____primary visual cortex.
light from objects in the lower visual field is processed by the ______ part of the primary visual cortex.
left
upper
Which of the rectus muscles depress the eyeball and which elevate the eyeball?
elevation- superior rectus and inferior oblique
depression- inferior rectus and superior oblique
Name the three nerves that supply sensory innervation to the face
CNV1- Ophthalmic
CNV2- Maxillary
CNV3- mandibular
What reflex is blinking?
The corneal reflex