Pupil constriction reatment12/13/2023 ![]() ![]() The combined use of several medications are generally required to sufficiently lower intraocular pressure. Most of the same eye-drops that are used for chronic forms of glaucoma ( chapter 7) are also used to treat acute angle closure glaucoma. The treatments for acute angle closure glaucoma are discussed in more detail below: While medications may temporarily treat an episode of acute angle closure, laser peripheral iridotomy is necessary to definitively treat and prevent future attacks. In most cases of angle closure glaucoma, medications are used first to lower the eye pressure to a point at which the laser peripheral iridotomy (see Chapter 8-A-2) can safely be performed. However, the definitive treatment for most cases of angle closure glaucoma is laser peripheral iridotomy. In rare cases intravenous medications may also be used. Initially, acute angle closure glaucoma is treated with a range of medicines that may be given as eye-drops or pills. ![]() The goals of treatment are to lower the pressure as soon as possible and to prevent further attacks. Intraocular pressure may be critically high in acute angle closure glaucoma. Section 9-D: Treatment of acute angle closure glaucoma When critically narrow angles are observed by an eye doctor, preventative laser surgery (laser peripheral iridotomy) is recommended to reduce the risk of angle closure glaucoma occurring (see Section 9-D). Dilation of the pupils can cause narrow angles in susceptible individuals to become abruptly closed. As the pupil gets bigger, the bulk of the iris moves towards the angle causing it to become more crowded and narrower. The risk for pupillary block and angle closure is increased when the pupil is dilated by dim illumination or by medication. Such far-sighted individuals are at greater risk for acute angle closure glaucoma, because the drainage angle in their smaller eyes is more crowded than in individuals with normal sized eyes. People with eyes that are physically smaller are generally far-sighted (hyperopic) and require more corrective power for seeing nearby objects than faraway objects. Similarly, angle closure glaucoma occurs more frequently with increased age, because as the lens of the eye grows larger with age, the anterior segment of the eye becomes more crowded and the drainage angle becomes narrower. Risk factors for acute angle closure glaucoma.Ĭertain medications that cause the pupil to dilate in susceptible eyeĪcute angle closure glaucoma is more common in females because females have eyes that are generally smaller than those of males. This abnormal configuration of the iris prevents normal flow of aqueous fluid through the pupil to the trabecular meshwork and causes an acute rise in intraocular pressure (Figure 9-1). The iris bows forward in the periphery and blocks aqueous fluid from reaching the trabecular meshwork and exiting the eye. Aqueous fluid collects behind the iris and causes it to bow forward and close the drainage angle. Pupillary block occurs when the lens comes in close contact with the iris around the pupil and prevents aqueous fluid from moving through the pupil. The most common form of angle closure glaucoma involves blockage of the pupil by the lens (pupillary block) and occurs in eyes that have narrow drainage angles. The intraocular pressure may become dangerously high and prompt treatment is necessary to prevent irreversible vision loss. The result is a rapid elevation of intraocular pressure (IOP) that causes a constellation of symptoms including decreased vision, seeing halos around bright objects, pain, and nausea ( Table 9-1). The iris and cornea become pressed together and consequently, aqueous fluid cannot get to the trabecular meshwork and make its way out of the eye ( figure 9-1). ![]() Section 9-A: Introduction to acute angle closure glaucomaĪcute angle closure glaucoma is a serious eye condition in which the drainage angle becomes obstructed such that aqueous humor cannot make its way out of the eye. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |