THE TERM "rupture of the choroid," as it is ordinarily used, does not refer to a single, well defined disease entity but, rather, is made to apply to two heterogeneous morbid states with dissimilar etiology, pathology and prognosis: disruption of the choroid due to direct injury and that due to indirect injury. These two choroidal changes can even be distinguished according to the region in which they occur. In the case of direct injury, the trauma results at the place of impact, and the rupture usually reaches so far in the anterior direction that its frontal end extends beyond the field of ophthalmoscopic examination. In the case of indirect injury, on the other hand, the trauma is produced by contrecoup, and the choroidal changes appear invariably in the posterior segment, distal to the area exposed to the impact. The present discussion is restricted to the latter, and more frequent, type