In three recent papers I discussed and illusstrated the pathologic changes in the lens in cases of perforating ulcer of the cornea,1 leukoma adherens2 and spontaneous iritis3 respectively. In each condition the primary lesion held to be the cause of the cataract was located in the anterior part of the globe. In the condition discussed in this paper, the fourth in sequence, the primary lesion was located in the posterior half of the eye. The purpose of these studies has been to ascertain the changes which may occur in a lens as a result of various pathologic conditions in the globe.
Clinically, there is considerable difference in the appearance of cataracts. The cataract that is associated with a retinal detachment often has a peculiar yellowish white hue, which is all the more noticeable because the pupil in a case of detachment, as a rule, is not small