By George A. Cioffi, MD
This part underwent significant revision for the 2008-2009 edition.Topics mentioned comprise the epidemiologic features of glaucoma; hereditary and genetic components; intraocular strain and aqueous humor dynamics; scientific assessment; clinical administration of and surgical treatment for glaucoma. This version comprises up-to-date tables and revised photos, in addition to various new pictures illustrating either sickness entities and surgical strategies.
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Additional info for 2008-2009 Basic and Clinical Science Course: Section 10: Glaucoma (Basic and Clinical Science Course 2008-2009)
C, View through biprism (7) reveals circular meniscus (2), which is converted into semicircle (3) by prisms. 3rd ed. Reproduced with permission from Shields MB. Textbook of Glaucoma. 28 . Glaucoma the area of flattening. The semicircles move with the ocular pulse, and the endpoint is reached when the inner edges of the semicircles touch each other at the midpoint of their excursion (Fig 2-5). Applanation measurements are safe, easy to perform, and relatively accurate in most clinical situations.
BCSC Section 8, External Disease and Cornea, discusses slit-lamp technique and the examination of the external eye in greater depth. Conjunctiva Eyes with acutely elevated lOP may show conjunctival hyperemia. The chronic elevation of rop that can occur with arteriovenous fistulae may produce massive episcleral venous dilation. Long-term use of sympathomimetics and prostaglandin analogs may also cause conjunctival injection, and long-term use of epinephrine derivatives may result in black adrenochrome deposits in the conjunctiva.
Of the currently available devices, the Goldmann applanation tonometer is the most valid and reliable. 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.
2008-2009 Basic and Clinical Science Course: Section 10: Glaucoma (Basic and Clinical Science Course 2008-2009) by George A. Cioffi, MD