_Subchoroidal hæmorrhage._ Of all the immediate complications which follow an intra-ocular operation this is by far the worst. The hæmorrhage is due to the giving way of a large choroidal vessel following the sudden reduction of tension, with the result that the choroid and retina are stripped up from the sclerotic, and, with the lens, may be partially extruded from the wound in the globe, from which the hæmorrhage then proceeds. It may occur whilst the patient is still on the operating table, or it may be discovered only after he has been put back to bed, the blood being seen coming through the dressings. Patients who have this condition complain of pain in the ‘corner of the eye’ at the time of the operation. The treatment consists in evisceration or enucleation. It is probable that limited extravasation of blood may also occur, which need not end in disintegration of the eye, but may cause vitreous opacity and defective vision for some weeks after the operation. =Remote.= 1. _The tension is not reduced by the iridectomy._ In acute cases the prognosis with regard to the reduction of the tension and the improvement of vision is very satisfactory. The same cannot be said of chronic cases, especially those which have been operated on rather late in the disease. If iridectomy, which may be repeated downwards or extended from the previous coloboma, fail to reduce the tension, one or more of the following measures should be adopted:-- (_a_) The use of eserine. (_b_) Sclerotomy. (_c_) Cyclo-dialysis. (_d_) Sclerectomy. (_e_) Post-scleral puncture. It is probably in this order that they should be tried. 2. _Prolapse of the iris and irido-cyclitis_ should be treated as already indicated under cataract extraction (see p. 208). 3. _The onset of glaucoma in the other eye_ may be induced by the dilatation of the pupil caused by bandaging, and is best avoided by the use of eserine. If it should occur, an iridectomy should be performed. 4. _Astigmatism_ produced by the incision is corrected with glasses. This astigmatism is very marked, often amounting to six or eight diopters or more. IRIDECTOMY FOR SMALL GROWTHS OF THE IRIS =Indications.= This is performed-- (i) As a diagnostic measure. (ii) As a curative measure. In the latter instance it is obvious that the growth must be very small and situated at the free margin of the iris to yield a satisfactory result, especially if it be of a malignant character. =Operation.= The operation is performed under cocaine, eserine having been previously instilled in order to contract the pupil. _First step._ An incision should be made with a narrow Graefe’s knife in the limbus in a position most suitable for removing the growth. The incision should be as large as possible so as to avoid wiping off any portions of the growth into the anterior chamber.