Trabecular Meshwork and Aqueous Outflow Flashcards
what is the anterior chamber depth? what is the horizontal diameter and vertical diameter?
3.6mm
11mm
vertical diameter is larger than the horiz by 100 micrometers
what is the anterior chamber filled with? to support what? how much can it hold?
aqueous humor to suppor avascular area *lens,cornea, trab meshwork.
can hold 200 microliters
where is the post chamber located? how much aqueous humor can it hold?
behind the iris and in front of the lens and can hold 50 micrometers
where is the anterior chamber located?
behind the cornea and in front of the lens and iris
the path of aqueous humor
- secreted by _____
- flows through the _____
- flows through the ______
- enters ____ on surface of the eye
- ciliary body
- pupil
- outflow pathway
- veins on surface of eye
every minute, how many microliters of aqueous humor are produced by the ciliary body
2.5 microliters
where is the trabecular meshwork
triangle that connects anteriorly to cornea and post to scleral spur
where does desceme’s membrane of corneal epithelium end and trabecular meshwork bein?
schwalbe’s line
wehre does trab meshwork insert
scerla spur-post area
what causes the trab meshwork to open and help the aqueous drain
one of the layers of the ciliary muscle is the longitudinal bundle. when it contracts it pulls the scleral spur posteriorly
what 2 parts are the trabeuclar meshwork divided into
uveal meshwork and corneosclera meshwork
which meshwork is close to the iris (AC side) and which is closer to the outside of the eye
uveal
corneoscleral
what is the pathway of the aqueous
uveal meshwork, corneoscleral meshwork, juxtacanalicular meshwork (JCT), schlemm’s canal, collector channels, deep scleral plexus, intrascleral plexus, episclearal veins
which region is the non-filtering region TM? what amount of pigment is here? why?
anterior region (not against SC) LESS pigemnt bc LESS flow here. more towards cornea
which region is the filtering region of TM? what amount of pigment? why?
post region (most flow go through this)
MORE pigment bc MORE flow here.
-phagocytic capabilities here
Schwalbe’s line is the peripheral terminus of which corneal layer?
descemet’s
the scleral spur serves as point of attachment for the:
longitudinal bundle of the ciliary muscle
in a gonioscopic view of the ant chamber angle which is positioned most inferiorly?
ciliary body band
gonioscopy is a lens used to see the angle and you will see 5 lines. from 1st to last what are tehy
schwalbe’s line (dark)
white and dark tabec meshwork
white scleral spur
ciliary body band
which of the portions of the trab meshwork is most of the normal aqueous outflow resistance felt to reside?
JCT-only here the space is small enough to generate significant resistnace to maintain normal IOP
which region of the trab meshwork is closest to the ant chamber?
uveal-closer to int of the eye
which region is more toward the surface of the eye
schlemm’s canal
which structures are observed along the inner wall endothelium of schlemm’s canal
giant vacuoles
aqueous humor leaving the canal of schlemm that does NOT enter an aqueous vein would first enter what?
collector channel
the approx %age of aq humor outflow that passes through the uveoscleral and trab outflow is?
20 and 80% respectively