History of Ophthalmology

History of Ophthalmology
Author: Harold E. Henkes
Publisher: Springer Science & Business Media
Total Pages: 151
Release: 2012-12-06
Genre: Medical
ISBN: 9400906412

When the eyeball is indented in total darkness, within less than 200 mil liseconds an oval or quarter-moon shaped spot of light is perceived in the part of the visual field corresponding to the indented region of the retina. In the seconds following, this phosphene extends across the whole visual field and alters in structure during further eyeball indentation. It is then seen as irregular large bright spots of light, finely structured moving light grains ('light nebula') and stationary bright stars. Regular geometrical patterns appear only when both eyes are indented simultaneously [1]. When the eyeball deformation is released, part of the retina again lights up for another one or two seconds and curved light lines are seen following the course of the larger retinal vessels (Fig. 1). In the following we will review the history of this phenomenon, which played an important role during the first 2200 years of vision theories and in the development of models to explain normal vision. 2. Pre-Socratic philosophers, Plato and Aristotle Alcmaeon of Croton (6-5th century B. C. ), who was a member of the Pythagoraean sect and one of the founders of Greek medicine, was the first to describe mechanical deformation of the eyeball leading to light sensa tions. According to Aristotle's pupil Theophrast of Eresos, Alcmaeon report ed that 'the eye obviously has fire within,for when the eye is struckfireflashes out' [2, p. 88].

Ocular Disease: Mechanisms and Management E-Book

Ocular Disease: Mechanisms and Management E-Book
Author: Leonard A Levin
Publisher: Elsevier Health Sciences
Total Pages: 707
Release: 2010-03-03
Genre: Medical
ISBN: 0702047414

Ocular Disease—a newly introduced companion volume to the classic Adler's Physiology of the Eye—correlates basic science and clinical management to describe the how and why of eye disease processes and the related best management protocols. Editors Leonard A. Levin and Daniel M. Albert—two of the world's leading ophthalmic clinician-scientists—have recruited as contributors the most expert and experienced authorities available in each of the major areas of ophthalmic disease specific to ophthalmology: retina, cornea, cataract, glaucoma, uveitis, and more. The concise chapter structure features liberal use of color—with 330 full-color line artworks, call-out boxes, summaries, and schematics for easy navigation and understanding. This comprehensive resource provides you with a better and more practical understanding of the science behind eye disease and its relation to treatment. - Covers all areas of disease in ophthalmology including retina, cornea, cataract, glaucoma, and uveitis for the comprehensive information you need for managing clinical cases. - Presents a unique and pragmatic blend of necessary basic science and clinical application to serve as a clinical guide to understanding the cause and rational management of ocular disease. - Features 330 full-color line artworks that translate difficult concepts and discussions into concise schematics for improved understanding and comprehension. - Provides the expert advice of internationally recognized editors with over 40 years of experience together with a group of world class contributors in basic science and clinical ophthalmology.

The Ophthalmic Assistant E-Book

The Ophthalmic Assistant E-Book
Author: Harold A. Stein
Publisher: Elsevier Health Sciences
Total Pages: 919
Release: 2012-08-15
Genre: Medical
ISBN: 1455733466

Excel in your clinical responsibilities with The Ophthalmic Assistant. Whether you work in an ophthalmology, optometry, or opticianry setting, this best-selling reference delivers expert practical, up-to-date guidance on ocular diseases, surgical procedures, medications, and equipment as well as paramedical procedures and office management - providing all the knowledge and skills you need to be a valuable asset to your team. A real "how-to" textbook. Consult this full-color visual guide for identification of ophthalmic disorders, explanations of difficult concepts, and depictions of the newest equipment used in ophthalmology and optometry – with over 1,000 illustrations. Refer to the practical appendices for quick-reference information on hospital/practice forms for more efficient patient record keeping, conversion tables, numerous language translations, ocular emergencies, pharmaceuticals, and more. Update your practical knowledge of ophthalmic tests and procedures. Confidently prepare for certification or recertification exams with comprehensive and practical information on the exam process for ophthalmic and optometric assistants. Optimize your results with OCT imaging and other innovative technologies used in today’s ophthalmic offices, clinics, and hospitals. Stay up to date with new drugs being used to treat a diverse range of eye diseases and disorders. Learn how to assist the newest refractive cataract surgery procedures. Update your knowledge of CPR procedures.