The Fluid system of the Eye Flashcards
What are the two types of intraocular fluids that exist in the eye?
aqueous humor and vitreous humor.
Where is aqueous humor?
it flows freely
Where is vitreous fluid?
it is a gelatinous mass with every little flow of fluid.
What is watery viscous fluid that fills the space between the lens and cornea?
the aqueous humor.
What is the function of aqueous humor?
To maintain the convex shape of the cornea and the normal intraocular pressure.
What serves as a source of nutrients to the eye?
The aqueous humor.
What kind of nutrients does the aqueous humor have?
amino acids, glucose, and vitamins.
What part of the eye are the nutrients for?
the avascular eye tissues that include the lens, epithelium of the posterior surface of cornea, trabecular meshwork, anterior vitreous surface..
What are the avascular eye tissues?
the lens, epithelium of the posterior surface of cornea, trabecular meshwork, anterior vitreous surface..
What removes waste from the avascular eye tissues?
the aqueous humor.
What is the aqueous humor composed of?
plasma but with less protein.
Where does the aqueous fluid drain into?
The schlemm canal and then into the systemic venous circulation.
Where is the vitreous humor located?
occupies the entire space between the lens and retina of the eyeball.
What membrane surrounds the vitreous?
hyaloid membrane.
What causes the retina to remain pressed against the choroid?
the vitreous humor
What are the three tiny spots that are attached to the retina?
anterior border of retina
the macula
and the optic nerve disk
What does the vitreous fluid look like?
gel like material that is clear colorless and transparent.
The vitreous body contains what?
a fibrous network
How is the vitreous humor formed?
produced and secreted by certain cells located in the retina.
Which humor is not drained?
the vitreous humor
Which humor is drained?
the aqueous humor
Which humor is stagnant?
the vitreous humor
What is the range of the normal intraocular pressure?
12-20mm Hg
What are facts that influence intraocular pressure?
balance between formation and drainage of aqueous humor, rate of formation, rate of drainage.
What is glaucoma?
abnormally high intraocular pressure due to increased production or poor drainage of aqueous humor.
What is an example of intraocular pressure in glaucoma patients?
60-70mm Hg
In glaucoma where is pressure exerted?
on optic discs causing deformation of area.
How does glaucoma effect nerve fibers and retinal artery?
it will lack nutrition of nerve fibers and compression of retinal artery.
