i:^mil REFRACTION AND ACUITYVISUAL REFRACTION AND VISUAL ACUITY BY KENNETH SCOTT M.D., CM., F.R.C.S.Edin. CONSULTING OPHTHALMIC SURGEON TO ST. MARY's HOSPITAL FOR WOMEN AND CHILDREN, LONDON, E. LATE LECTURER ON OPHTHALMOLOGY; WEST LONDON POST-GRADUATE COLLEGE PROFESSOR OF ; OPHTHALMOLOGY, EGYPTIAN GOVERNMENT MEDICAL school; AND OPHTHALMIC SURGEON, KASR- EL-AINI HOSPITAL, CAIRO, EGYPT WITH SIXTEEN ILLUSTRATIONS AND A COLOURED PLATE NEW YORK REBMAN COMPANY I I BROADWAY23 Reserved^// Rights I" INTRODUCTION followingThe pages are principally intended to assist the general practitioner of medicine ; who, more and more, feels the need of closer ac-a quaintance theirwith the errors of vision and correction ; and who frequently finds it difficult to attend a practical course of post-graduate instruction on the subject. The effort has been made here to avoid ab- struseness, and confine attention simply to the most essential has omitted to rarerpoints : reference been questions, for which standard works are available. Best thanks are due to the members of the different branches of His Majesty's Services ; to the Officials of the Railway and Shipping Companies, both at home and abroad and to all others who; have been kind enough in troubling to supply the various points of information which are presented in the latter part of this book. Also to Mr.
i:^milREFRACTION AND ACUITYVISUALREFRACTION AND VISUAL ACUITY BY KENNETH SCOTT M.D., CM., F.R.C.S.Edin. CONSULTING OPHTHALMIC SURGEON TO ST. MARY's HOSPITAL FOR WOMEN AND CHILDREN, LONDON, E. LATE LECTURER ON OPHTHALMOLOGY; WEST LONDON POST-GRADUATE COLLEGE PROFESSOR OF ; OPHTHALMOLOGY, EGYPTIAN GOVERNMENT MEDICAL school; AND OPHTHALMIC SURGEON, KASR- EL-AINI HOSPITAL, CAIRO, EGYPT WITH SIXTEEN ILLUSTRATIONS AND A COLOURED PLATE NEW YORK REBMAN COMPANY I I BROADWAY23Reserved^// Rights