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TO

L. A. DESMARRES,

PROFESSOR OF OPHTHALMOLOGY AT PARIS,

OFFICER OF THE LEGION OF HONOUR,

KNIGHT OF VARIOUS ORDERS OF SWEDEN, BELGIUM,

SICILY, AND ROME,

&c., &c.,

THESE PAGES ARE INSCRIBED

BY HIS FORMER PUPIL,

THE AUTHOR.

PREFACE.

The very favourable notice which these papers received from the French Medical Press on their appearance in the columns of The Lancet, encourages me to republish them in this collected form.

The discovery of the Ophthalmoscope, by enabling us to ascertain accurately the condition of the deepseated structures of the eye, has given an impulse to the cultivation of all branches of ophthalmic science, from which, so important an operation as that for the cure of cataract could not remain excluded.

Indeed, so numerous have been the modifications introduced within a short period, that no small amount of confusion has resulted. Operation after operation has been brought forward, lauded as an improvement, and then abandoned, so that only a careful study of the progress of this branch of surgery will prevent one practising operations which had been abandoned as useless by their projectors. I have, therefore, in the first place, given a succinct account of the various operations that have from time to time been introduced, and have

given an estimate, which I have tried to render as impartial as possible, of the advantages and disadvantages of each.

In the revolution which has taken place, I have endeavoured to preserve the really valuable ideas that have been suggested, from being lost amidst the waste in which, in many cases, they have been imbedded.

The operation which I have proposed, and to which I have given a fair trial-extending over a period of four years—has proved so encouraging in its results, as, I think, fairly to warrant me in hoping that it may prove of permanent advantage, and by diminishing the risk of failure, be an acquisition in the treatment of this affection.

UNION STREET, ABERDEEN,

August, 1868.

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