The purpose of the book entitled “Best Aid to Ophthalmology” is to make the complex subject simple and studying an easy task, yet master it in the limited time available. Ophthalmology is a broad subject in itself and is ever expanding like any other specialty of medicine. The book is organized in question-and-answer format. Various information have been arranged as tables and flow charts. Also, the mnemonics makes memorizing an easy task. Diagrams are in a fashion that they can be easily reproduced in examinations. The book is prepared like a preparatory manual for examinations. It is also helpful for postgraduates in fast revision of the subject. The chapters are divided according to the anatomies of an eye and their diseases.