We in ophthalmology are fortunate to be able to measure quantitatively many aspects of ocular morphology and visual function. These measurements are either objective (e. g. electroretinography, tonometry, electromyography, visually evoked responses, etc.) or subjective and psychophysical (e. g. visual acuity, visual fields, color vision, etc.). One aspect of corneal physiology and pathology which has so far escaped careful and reliable measurements is corneal sensitivity. Previous attempts have been rather crude and can be compared to measuring intraocular pressure by digital compression. Professor Draeger has for the last decade and a half directed his attention to the question of esthesiometry of the cornea. He has a gift for constructing and devising new ingenious ocular instruments. His handheld tonometer is a splendid example. He has now applied the principle of this instrument to the new electronic optical esthesiometer. In many publications he has reported on his first results using this modern technique to study corneal physiology and evaluate certain pathologic conditions. In this monograph Professor Draeger has collected all of his material and reports on his long experience. The usefulness of this instrument is just beginning to be appreciated. It is obvious that this new measuring device will help us in the fitting of contact lenses, evaluating herpes simplex infections of the cornea, follow the postoperative course of patients with a penetrating keratoplasty, etc.

This is a new release of the original 1948 edition.

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Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone!

Social Complexity in Prehistoric Eurasia challenges current interpretations of the emergence, development, and decline of social complexity in the steppe region of China and the former Soviet Union. Through a thematic investigation of archaeological patterns ranging from monument construction and use and production and consumption of metals to the nature of mobility among societies, the essays in this volume provide the most up-to-date thinking on social and cultural change in prehistoric Eurasia. Collectively, they challenge broader theoretical trends in Anglo-American archaeology, which have traditionally favored comparative studies of sedentary agricultural societies over mobile pastoralist or agro-pastoralist communities. By highlighting the potential and limitations of comparative studies of social complexity, this volume sets the agenda for future studies of this region of the world. It emphasizes how the unique nature of early steppe societies can contribute to more comprehensive interpretations of social trajectories in world prehistory.

How to Make Your Safety the Key to Construction Profits and Schedule Performance. Although there are bright spots, the prevailing safety condition within the construction industry is bleak because people continue to be injured or killed in the workplace. The attitudes and hidden mindsets that create this condition are: (1). Safety is seen to slow down and even interfere with production; (2). People believe that everything reasonable that can be done is already being done; (3). We are dodging bullets and that can only work for so long; and (4). People behave strangely; don't think ahead; don't always do the right thing. The fact of the matter is you can get to zero-harm if you approach the goal scientifically, systematically, using problem-solving skills, and persisting until you get what you want. This book offers new tools and introduces the behaviors and mindsets you need to solve the most challenging safety related issues within your organization. See what other have to say: " 'Safety Under Construction' is your must-read for this year. They have delivered a practical approach to make safety the focal point of your business and] They have clearly diffused the myth that safety is in theway of profits and performance" - Dana W. Clarke Sr., CEO of AIA, LLC; Certified TRIZ Specialist; Certified Organizational Engineer ALSO SEE: "I have managed many construction crews and sometimes you face a critical moment where the quality of your field-call affects lives and a successful project outcome. So much is riding on what decision you make in that moment 'Safety Under Construction' addresses this important but almost never discussed topic of split-second decision-making. Crew supervisors and managers will appreciate this valuable information. 'Safety Under Construction' raises the bar to an entirely new level of expectation for worker safety." - Ophir Orr, Construction Industry Mechanical Engineer, P.E.