![]() ![]() ![]() Acute angle closure is a very serious and the most dramatic form of angle closure where the angle completely closes all at once, and IOP suddenly rises to very high levels. In others, closure can occur all at once leading to acute angle closure crisis. The high IOP causes damage to the optic nerve and results in irreversible vision loss. With time the extent of closure worsens and the IOP starts to increase and may become erratic. What can happen if I have narrow angles?Ī patient with a narrow angle who is susceptible to closure can develop a slow progressive form of closure where parts of the angle begin to close without causing any symptoms or a noticeable change in eye pressure (intraocular pressure or IOP). A narrow angle less than 10 degrees in width is at higher risk for closure.Ĭlosed angle-in this case the iris is pushed up completely into the angle and the trabecular meshwork is not visible. When the space becomes so narrow that the iris makes contact up against the sclera the pathway to the trabecular meshwork is blocked and the angle is said to be closed. Nearsighted or myopic persons tend to have wide angle widths and farsighted or hyperopic persons tend to have narrower widths. The space between the iris and sclera varies in width between individuals. The diagram below shows that internal eye liquid called aqueous humor fluid is formed by the ciliary body and circulates between the lens and iris, passes through the pupil, and then drains into the trabecular meshwork. There are 4 important structures in the angle iris, sclera, the trabecular meshwork, and the ciliary body. The angle is the location where the iris meets the sclera as shown in the diagram below. Where is the angle? The diagram below is a helpful reference and will help you understand the anatomy. Before you can begin to understand angle closure glaucoma you need to understand what a narrow angle means. Patients with narrow angles but otherwise normal healthy eyes are called primary angle closure suspects. The spectrum of primary angle closure glaucoma begins with having a narrow angle. Narrow Angles and Primary Angle Closure Glaucoma ![]()
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