_3. Dislocation of the Lens behind the Retina._--This accident was known to the early writers, and Mackenzie expressly gives the warning that, if in effecting depression “the handle of the needle is raised much higher than the horizontal position, the cataract is apt to be pressed through the retina, and vision extinguished.” Daviel had met with the same condition in eyes which he dissected after death, and which had been couched by other surgeons. We, too, encountered it twice in our pathological material. In one eye the retina had been torn away from the ora serrata, and the lens pushed behind it; in the other, an extensive hole had been torn in the retina, and through this the cataract had been thrust. In both, the cataracts were Morgagnian and had been dislocated in their capsules, and in both, the retinæ had undergone total detachment, in this latter respect testifying to the value of Mackenzie’s warning. =A Comparison of Depression and Reclination.=--There can be no question that the operation of reclination breaks up the vitreous body to a considerably greater extent than mere depression of the cataract does. On the other hand, the claim is made that after its performance the lens is much less likely to undergo reascension; indeed, it was for this reason that Willburg introduced the method; and, if we may judge from the evidence of later writers, he was justified by results. So far as the Indian coucher is concerned, it seems a little doubtful whether he has any clear conception of the difference between the two procedures; indeed, so long as he gets the lens out of the way of the pupil, it is probable that he neither knows nor cares which method he has succeeded in adopting, though he probably much more often reclines than depresses. This may be explained by the experience of a number of European surgeons, that it is more easy to effect reclination than depression. An interesting point is that in quite a number of our pathological specimens the lens lay in front of the anterior hyaloid membrane, and therefore outside the vitreous body; most of these were cases of depression, but in a few of them the lens is turned backwards at an angle with its ordinary plane, clearly showing that a partial reclination had been effected.