By K.V. Chalam, MD, PhD

ISBN-10: 161525109X

ISBN-13: 9781615251094

Offers the fundamental medical grounding for present ophthalmic perform. Discussions disguise ocular anatomy, embryology, the biochemistry and metabolism of the attention and the newest advancements in eye-related molecular and medical genetics reviews. comprises information regarding ocular pharmacotherapeutics, up-to-date drug info and a dialogue of the felony elements of scientific remedy. final significant revision 2009 2010.

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Read or Download 2011-2012 Basic and Clinical Science Course, Section 2: Fundamentals and Principles of Ophthalmology (Basic & Clinical Science Course) PDF

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Extra info for 2011-2012 Basic and Clinical Science Course, Section 2: Fundamentals and Principles of Ophthalmology (Basic & Clinical Science Course)

Sample text

Sepa rat ion of the collagen fibr ils by edema fluid leads 10 stromal clouding. The macroperiodicity of the fibrils (640 A) is typical of collagen. The stroma's collagen types are I, III, V, and VI. Type VII forms the anchoring fibril of the epitheli um. The ground substance of the cornea consists of proteoglyca ns that run along and between the collagen fibr ils. Their glycosaminoglycan components (eg, keratan su lfate) are highly cha rged and account for the swelling property of the stro ma. The kerato cytes lie between the corneal lamellae and synthesize both collagen and proteoglycan s.

The venous drainage of the eyelids can be divided into 2 portions: a superfiCial, or pretarsal, system. which drains into the internal and external jugular veins; and a deep, or posttarsal, system, which flows into the cavernous sinus. Lymphatics of the Eyelids Lymphatic vessels are found in the eyelids and conjunctiva, but neither lymphatic vessels nor nodes are present in the orbit. Lymphatic drainage from the eyelids parallels the CHAPTER " Orbit and Ocular Adnexa. 31 course of the veins (Fig 1-33).

FCourtesy of Thomas A. ) Stroma Anterior banded layer Posterior nonbanded layer Oescemet's membrane Endothelium Anterior chamber Figure 2-5 Corneal endothe lium and Descemet's membrane. (Illus tration by Thomas A. Weingeist. ) Endothelium The corneal endothelium is composed of a single layer of mostly hexagonal cells derived from the neural crest (Fig 2~6). The corneal endothelium is therefore of neuroectodermal origin. Approximately 500,000 cells are present, wi th a density of about 3000 cells/mm'.

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2011-2012 Basic and Clinical Science Course, Section 2: Fundamentals and Principles of Ophthalmology (Basic & Clinical Science Course) by K.V. Chalam, MD, PhD

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