Ogura's operation consists of resection via De Lima's approach of the bony floor of the orbit and the lateral wall of the ethmoid. The orbital periosteum is then incised in order to allow the orbital fat to enter the sinuses and thus decompress the orbit. In most cases the operation is performed on both sides at the same time. It is used in cases of malignant or severe thyrotoxic exophthalmos, or in the presence of optic neuritis. The results obtained were good in 9 cases with a marked reduction in exophthalmos and rapid cure of optic neuritis. An additional ophthalmological procedure is sometimes necessary in order to perfect the anesthetic result.