Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Since the introduction of the perfected ophthalmometer into ophthalmic practice, rapid strides forward in the art of the refraction of the eye have been made. With its aid, the practice of fitting glasses quickly and accurately and, as a rule, without the aid of any mydriatic whatever has been attained. It is to the end of demonstrating the clinical and practical use of the ophthalmometer, and of recording the advances made in the science and practice of the Refraction of the Eye, that this book has been written. Some half dozen books on Ophthalmoscopy and Retinoscopy have been written, and the time is opportune for one on Ophthalmometry. We have one such book in French, Javal s3l Smoires d Ophtalmom Strie, but none in English.<br><br>While the present book is intended more especially for beginners, and for those who have not had the advantage of personal instruction in the use of the ophthalmometer, it is hoped that its clinical details will interest those in active practice, and who are well versed in the use of the instrument of which it treats. I am especially desirous that it shall be read by a certain rather considerable number of oculists Avho have the ophthalmometer in their offices, but who, from the want of a proper understanding of it, through faulty instruction or a lack of personal instruction, do not use it; or, if they do know how to use it, do not take into consideration the limitations of the instrument, and abandon it on that account.
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