""An Essay On The Nature And The Consequences Of Anomalies Of Refraction"" is a book written by Franciscus Cornelius Donders and published in 1899. The book is a detailed study of the anomalies of refraction, which are defects in the ability of the eye to focus light on the retina. The author discusses the different types of anomalies, their causes and consequences, and the various methods of correcting them. The book also explores the impact of anomalies...