Eye Flashcards
What is the function of the vitreous chamber
Maintains the shape of the eye
What is the function of the vitreous humor?
Nourishes the avascular cornea
Maintains intraocular pressure
Aqueous humor is secreted in the ___ by ___
Posterior chamber
By ciliary body
Aqueous humor is absorbed by
Scleral venous channel
Outer layer of eye is
Fibrous
Middle layer of eye is
Vascular/muscular
Outer layer of eye contains
Sclera + cornea
Middle layer of eye contains
Choroid + ciliary body + iris
Inner layer contains
Retina
What structure allows light to enter the eye
Cornea
What nerve pierces the sclera and where specifically?
Optic nerve pierces sclera at the optic disc
What part of the eye contains general afferent nerves and vessels
Choroid
Ciliary body consists of
Ciliary process
Ciliary muscle
Zonular fibers
Ciliary muscle is under __ control
Parasympathethic
What is the function of zonular fibers
Attach ciliary muscles and processes to periphery of lens
What is the area of most acute vision?
Fovea centralis
What is accomodation?
Process of changing lens shape to focus light from NEARBY objects on macula lutea and fovea centralis for acute vision (reading)
Contraction of ciliary muscle –>
Decreases size of ciliary body
Loosens zonular fibers
Mueller’s muscle is
Smooth muscle associated with the upper tarsal plate
Mueller’s muscle is innervated by
Sympathethic fiers from the superior cervical ganglion
What are tarsal/meibomian glands?
Glands that secrete an oily substance to increase the viscosity of tears
Orbicularis oculi is innervated by ___
Levator palpebrae is innervated by ___
OO: facial nerve
LP: oculomotor nerve
Lobes of the lacrimal gland
Orbital
Palpebral
