The modern treatment of ocular imbalance

Historical Significance: This is a practical manual describing the treatment of ocular imbalances by means of the Genothalmic Kratometer, an instrument developed by the publishing company. See Cat nos 240, 245 and 306 for other books on the Kratometer. The Kratometer?(kra?tom?e?ter) is?a prism-refracting instrument for use in orthoptic training. The General Optical Company also made one, an example of which is held by College of Optometrists London (pictured) see http://www.museyeum.org/detail.php?t=objects&type=all&f=&s=kratometer&record=0. See Cat No 913 for an example of the Kratometer held by the Kett Museum.