By American Academy of Ophthalmology, George A. Cioffi MD

ISBN-10: 1615255648

ISBN-13: 9781615255641

Offers a finished dialogue of glaucoma, together with epidemiology and the social and fiscal affects of the affliction; hereditary and genetic components; intraocular strain and aqueous humor dynamics; and scientific evaluate and surgical remedy. a few of the periods of clinical treatment for glaucoma are defined by way of efficacy, mechanism of motion and defense. includes a number of photographs illustrating sickness entities and surgical techniques.

Upon final touch of part 10, readers could be capable to:

Identify the epidemiologic good points of glaucoma, together with the social and financial affects of the disease
Describe the scientific review of the glaucoma sufferer, together with background and common exam, gonioscopy, optic nerve exam, and visible field
Describe the scientific beneficial properties, review, and remedy of basic open-angle glaucoma and normal-tension glaucoma
List many of the medical gains of and healing methods for the first and secondary open-angle glaucomas

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Additional resources for 2014-2015 Basic and Clinical Science Course (BCSC): Section 10: Glaucoma

Sample text

In a clinical setting, this measurement requires a force that flattens (applanates) or indents the eye. Applanation tonometry, the most widely used method, is based on the Imbert-Fick principle, which states that the pressure inside an ideal dry, thin-walled sphere equals the force necessary to flatten its surface divided by the area of the flattening: P=FIA where P = pressure, F = force, and A= area. In applanation tonometry, the cornea is flattened, and IOP is determined by measuring the applanating force and the area flattened (Fig 2-4).

In angle closure, the peripheral iris obstructs the trabecular meshwork-that is, the meshwork is not visible on gonioscopy. The width of the angle is determined by the site of insertion of the iris on the ciliary face, the convexity of the iris, and the prominence of the peripheral iris roll. In many cases, the angle appears to be open but very narrow. It is often difficult to distinguish a narrow but open angle from an angle with partial closure; dynamic gonioscopy is useful in this situation (see Figs 3-2 and 3-3).

The prelaminar region is principally supplied by direct branches of the short posterior ciliary arteries and by branches of the circle of Zinn -Haller, when it is present. In eyes with a well-developed circle of Zinn-Haller, arterial branches emerge to supply both the prelaminar and the laminar regions. The lamina cribrosa region also receives its blood 44 • Glaucoma • supply from branches of the short posterior ciliary arteries or from branches of the circle of Zinn-Haller; this is similar to the prelaminar region.

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2014-2015 Basic and Clinical Science Course (BCSC): Section 10: Glaucoma by American Academy of Ophthalmology, George A. Cioffi MD


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