By George A. Cioffi, MD
This part underwent significant revision for the 2008-2009 edition.Topics mentioned contain the epidemiologic facets of glaucoma; hereditary and genetic components; intraocular strain and aqueous humor dynamics; scientific evaluate; scientific administration of and surgical remedy for glaucoma. This variation comprises up-to-date tables and revised pictures, in addition to a number of new pictures illustrating either sickness entities and surgical suggestions.
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Extra info for 2008-2009 Basic and Clinical Science Course: Section 10: Glaucoma (Basic and Clinical Science Course 2008-2009)
5 ilL) or substantially increase the pressure in the eye, this method is relatively unaffected by ocular rigidity. Table 2-3 lists possible sources of error in tonometry. An excessive amount of fluorescein results in wide mires and an inaccurately high reading, whereas an inadequate amount of fluorescein leads to artificially low readings. Marked corneal astigmatism causes an elliptical fluorescein pattern. To obtain an accurate reading, the clinician should rotate the prism so the red mark on the prism holder Figure 2-5 Semicircles of Goldmann-type applanation tonometer.
The mean value reported CHAPTER 2: Intraocular Pressure and Aqueous Humor Dynamics. 30 flL/min/mm Hg. Outflow facility decreases with age and is affected by surgery, trauma, medications, and endocrine factors. Patients with glaucoma and elevated lOP have decreased outflow facility. Trabecular Outflow Traditional thought contended that most of the aqueous humor exits the eye by way of the trabecular meshwork-Schlemm's canal-venous system. However, recent evidence questions the exact ratio of trabecular to uveoscleral outflow.
6 Goniophotos of neovascularization of the angle. A. Anatomically Closed angle. (PartA courtesy of Keith Barton. MD;part B courtesy of Ronald L. Gross. ) open angle. B. 44 . Glaucoma Figure 3-7 of sheetlike (Courtesy Goniophoto showing both an area PAS (left) and an open angle (right), of Louis B. Cantor, Pigmentation MD,) of the trabecular meshwork increases with age and tends to be more marked in individuals with darkly pigmented irides. Pigmentation can be segmental and is usually most marked in the inferior angle.