This book is intended to supply the student of ophthalmology with all the Optics which is necessary for an intelligent knowledge of his subject. The proofs are in some cases a little confusing at first reading, but they never demand more than a very elementary acquaintance with mathematics. Even where a trigonometrical nomenclature has been in evitable the meaning of the signs is usually self evident. Special care has been taken to emphasise all important propositions by italics, so that those who do not care. To grapple with the proofs are provided with a readily accessible synopsis of results. A short bibliography of the best books upon the subject has been added, so that the advanced student may know where to look for further information.

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