Excerpt from Defective Eyesight: The Principles of Its Relief by Glasses First attempts to accurately estimate the visual power. Jaeger's and Snellen's test-types. The choice of glasses on seien tific principles made practicable by Donders. - The invention of the ophthalmoscope. - Apparatus required for testing vision. Conditions of the eye requiring glasses - The varieties of astig matism. The ophthalmometer. Asthenopia. Definitions of the conditions to be discussed in the following chapters. About the Publisher ...
Read More
Excerpt from Defective Eyesight: The Principles of Its Relief by Glasses First attempts to accurately estimate the visual power. Jaeger's and Snellen's test-types. The choice of glasses on seien tific principles made practicable by Donders. - The invention of the ophthalmoscope. - Apparatus required for testing vision. Conditions of the eye requiring glasses - The varieties of astig matism. The ophthalmometer. Asthenopia. Definitions of the conditions to be discussed in the following chapters. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Read Less
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
