Eye Strain
the condition occasioned as a result of using the eyes where the light is bad or the conditions unfavorable. The adverse condition is often produced as a result of imperfect balance of the ocular muscles, and the results are sometimes serious. There is always a waste of nerve force and there is often headache; but where the condition is prolonged, convulsions, chorea, hysteria, and dementia may be among the consequences. The malady may be remedied by the use of proper glasses, and on the other hand it may be aggravated by the use of improper glasses. Where the painful condition is the result of constitutional defects, a normal condition may be brought about by surgical operation.
EYLAU (i'lou), a town of 3,600 inhabitants, 23 miles S. of Königsberg by rail. Here Napoleon encountered the allies-Russians and Prussians-under Bennigsen, Feb. 8, 1807. Darkness came on while the contest was still undecided; but as Napoleon had a considerable force of fresh troops close at hand, the allies retired during the night on Königsberg.
Their loss is estimated at about 20,000; that of the French is set down at 10,000, but must have been considerably greater.
The place is called Preussisch-Eylau, to distinguish it from Deutsch-Eylau, a town of about 5,000 inhabitants, 89 miles N. E. of Bromberg.
EYRA (i'rä), in Scandinavian mythology, the physician of gods.