What makes up the trabecular meshwork?
The trabecular meshwork is the spongy tissue located near the cornea through which aqueous humor flows out of the eye. The trabecular meshwork lies in the drainage angle (see video above), and 80 – 90 percent of aqueous humor makes its way into circulation via the trabecular meshwork and its associated structures.
What is the trabecular meshwork in the eye?
The trabecular meshwork is a tissue located in the anterior chamber angle of the eye, and it is a crucial determinant of intraocular pressure values because of its resistance to the evacuation of aqueous humor from the eye. Both nutrition of lenses and maintenance of IOP are critical for a normal visual process.
What is trabecular outflow?
The trabecular outflow pathway is the primary draining tissue for the aqueous humor in the eye. It consists of 3 structures, the trabecular meshwork (TM), juxtacanalicular tissue, and Schlemm’s canal. In a healthy eye, IOP is maintained within a narrow range through dynamic regulation of trabecular outflow resistance.
What is the uveal meshwork?
The uveal meshwork extends from the ciliary body in the angle recess to Schwalbe’s line and covers the ciliary body face, the scleral spur, and the trabecular meshwork. In most eyes the uveal meshwork is colorless and is either not visible or is seen only as a glistening veil in the angle of young patients.
Which part of the trabecular meshwork contains a large amount of elastin?
Corneoscleral meshwork
Corneoscleral meshwork – Contains a large amount of elastin, arranged as a series of thin, flat, perforated sheets arranged in a laminar pattern; considered the ciliary muscle tendon.
What blocks trabecular meshwork?
Angle-closure glaucoma occurs when the iris is positioned against the trabecular meshwork, blocking the flow of aqueous out of the eye and raising the intraocular pressure.
What are the two natural aqueous outflow pathways?
Aqueous humor outflow occurs through two routes, the conventional and uveoscleral pathways.
What are the two types of glaucoma?
There are several types of glaucoma. The two main types are open-angle and angle-closure. These are marked by an increase of intraocular pressure (IOP), or pressure inside the eye.
What is anterior to trabecular meshwork?
From gonioscopic observations, the trabecular meshwork was tentatively divided into anterior and posterior parts. The anterior part was defined as the zone from the Schwalbe’s line to the anterior edge of the Schlemm’s canal, and the posterior part was from the anterior edge of the Schlemm’s canal to the angle recess.
What blocks the trabecular meshwork in glaucoma?
Pigment dispersion, where tiny fragments or granules from the iris (the colored part of the eye) can circulate in the aqueous humor (the fluid within the front portion of the eye) and block the trabecular meshwork, the tiny drain for the eye’s aqueous humor.
