The reactions to the German edition of this book have been most contradic tory. While some readers found the book absolutely unnecessary ("Surgery is learned from practice, not from theory"), others were enthusiastic (" Just the sort of book I have always needed "). In my opinion the divergent recep tion of the book is best explained by the comment of my friend, BALDER GLOOR *, who called the book a "grammar of eye surgery". Indeed there are people who can learn a language by practice alon...

It gives me particular pleasure to write the foreword to this book; this is largely due to the fact that I have devoted a substantial part of my life to the improve ment of the methods used in ophthalmic research. Rarely has one of my students taken the opportunity of dealing systematically with the possibilities of these methods. Dr. Eisner is, however, one of these exceptions. First, he has substantially improved the indentation contact glass; secondly, he has, with untiring enthusiasm, ...