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Glaucoma 1 is a form of primary open-angle glaucoma (POAG), which is characterized based on a specific pattern of defects in the optic nerve, thus causing visual defects. [ 5 ] [ 21 ] The disease causes an angle in the anterior chamber of the eye to be left open, which in turn causes the intraocular pressure to be increased.
There are different types of glaucoma, but the most common are called open-angle glaucoma and closed-angle glaucoma. [7] Inside the eye, a liquid called aqueous humor helps to maintain shape and provides nutrients. The aqueous humor normally drains through the trabecular meshwork. In open-angle glaucoma, the draining is impeded, causing the ...
Primary congenital glaucoma is classified into three subtypes: [4] true congenital glaucoma, which causes signs of increased intraocular pressure within the first month of life, infantile glaucoma, which presents between one month and three years, and; juvenile glaucoma, which becomes clinically apparent after three years of age and before age 40.
Lens induced glaucomas or Lens related glaucomas are either open-angle or closed-angle glaucomas that can occur due to a neglected advanced cataract (cloudiness of the lens) or a dislocated lens. It is a type of secondary glaucoma. The angle-closure glaucoma can be caused by a swollen or dislocated lens.
Glaucoma medication is divided into groups based on chemical structure and pharmacologic action. The goal of currently available glaucoma therapy is to preserve visual function by lowering intraocular pressure (IOP) in patients that have an increased intraocular pressure.
Phacomorphic glaucoma is an eye disease that can occur due to a neglected advanced cataract.In this, the mature cataractous lens cause secondary angle closure glaucoma.The presence of an asymmetric mature cataractous lens, shallow or closed anterior chamber angle, raised intraocular pressure (IOP) and other typical signs and symptoms of angle-closure glaucoma in the eye may lead to a diagnosis ...
A wide angle allows sufficient drainage of humour through the trabecular meshwork (unless obstructed), whereas a narrow angle may impede the drainage system and leave the patient susceptible to acute angle-closure glaucoma. Gonioscopy indicates the angular width of the iridocorneal angle by the number of ocular structures visible above the rim ...
Open-angle glaucoma (OAG) and closed-angle glaucoma (CAG) may be treated by muscarinic receptor agonists (e.g., pilocarpine), which cause rapid miosis and contraction of the ciliary muscles, opening the trabecular meshwork, facilitating drainage of the aqueous humour into the canal of Schlemm and ultimately decreasing intraocular pressure.