No Abstract Available.
Retinal Detachment* ; Retinal Perforations* ; Retinaldehyde*

No abstract available.
Retinal Detachment* ; Retinal Perforations* ; Retinaldehyde*

No abstract available.
Retinal Perforations* ; Ulnar Neuropathies*

In 10 patients who complained of photopsia or "spots before their eyes", indirect ophthalmoscopy with scleral depressor was performed very carefully. In 7 out of 10 of these patients, we found retinal holes which were not easily detectable. Also, on 3 of these 7 patients, prophylactic cryopexy was performed. Therefore, we feel that indirect ophthalmoscopy should be done not only on patients who present these symptoms, but this examination should also be performed on asymptomatic patients as well.
Humans ; Ophthalmoscopy ; Retinal Perforations

Idiopathic macular holes are believed to arise from traction of the posterior vitreous membrane. Traditionally, macular holes have been considered as untreatable condition, but recently vitreous surgeries are being attempted to manage them. Pars plana vitrectomy in conjunction with separation of the posteror vitreous membrane and intraocular achieve visual improvement and anatomic reattachment in eyes with full thickness macular hole. A total of 9 eyes which included 2 eyes with stage 2 macular hole and 7 eyes with stage 4 macular hole underwent vitrectomy. The macular holes were successfully occluded in all 9 eyes and visual improvement of two lines or more was achieved in 6(67%) in which symptom duration was 3 months or less and/or hole size was 1/3DD or smaller. These results suggested that the full thickness macular holes would be surgically treatable lesions and better visual results can be expected in cases with shorter duration and smaller size.
Membranes ; Retinal Perforations* ; Traction ; Vitrectomy

No abstract available.
Glaucoma, Angle-Closure ; Retinal Perforations

Human ; Female ; Middle Aged ; RETINAL NEOVASCULARIZATION ; RETINAL NEOVASCULARIZATION/SURGERY ; RETINAL PERFORATIONS ; RETINAL PERFORATIONS/SURGERY ; HUMAN ; FEMALE

We evaluated the relationship between the surgical success of idiopathic macular hole and sex, age, duration, epiretinal membrane, preoperative visual acuity, size of the hole, and surgical method. Of all 25 eyes in 23 patients, 14 eyes(56%)showed anatomical success(disappearance of the hole), and 17 eyes(68%)functional success(the final visual acuity of 0.15 or more with more than one line improvement). There were statistically significant differences of anatomical(p=0.001)and functional success(p=0.020)between the Group I where its macular hole was less than one-fourth of the optic disc in size and the other group, and anatomical success(p=0.039)between the group with the age of less than 70 years(Group A)and the other group. In Group I, anatomical and functional success were both 92%(11 eyes/12 eyes). In Group A, anatomical and functional success were 72%(13 eyes/18 eyes)and 77%(14 eyes/18 eyes), respectively, and there was statistically significant relationship between size of the hole and anatomical success(p=0.024), and difference of anatomical success between the group with duration of less than 6 months and the other group(p=0.023). Good surgical result may be expected in the idiopathic macular hole of the age of less than 70 years with about 350 micrometer or less in size and duration of less than 6 months.
Epiretinal Membrane ; Humans ; Retinal Perforations* ; Visual Acuity

Silicone oil is widely used as a retinal tamponade in the treatment of PVR. But reproliferation of membrane can occur under the silicone oil. Formerly, silicone oil was believed to suppress the proliferation of membrane, but recently, there were reports that silicone oil might actually promote proliferation of membrane, and recommended to use long-lasting gas rather than silicone oil. But it is known that proliferation of membrane can also occur in the eye in which intraocular gas has been used. So a careful study to compare the effect of intraocular gas and silicone oil to proliferation of membrane is needed. Rabbits are divided into three groups. Retinal tears were made in all the groups. in control group, no further surgery was done, and in the other two group, perfluoropropane gas was injected into the vitreous cavity. The intraocular gas was left unchanged(gas group), or it was exchanged with silicone oil 3 days later(silicone oil group). The fundus was examined periodically, and the eyeball was removed at 1, 2, 4, and 8 weeks after surgery for histopathologic study with light and electron microscope. Both intravitreal gas and silicone oil were shown to increase the formation of proliferative membrane compared to control group, but there was no statistically significant difference between them.
Membranes ; Rabbits ; Retinal Perforations ; Retinaldehyde ; Silicone Oils*

Macular hole can be quantitated by measuring its diameter, depth and volume with Heidelberg retina tomograph(HRT). In this study, effectiveness of macular hole surgery was investigated using HRT. Patients with good preoperative visual acuity showed better visual improvement after surgery. The macular holes of stage 1 and stage 2 had better visual prognosis than those of stage 3 and stage 4. Idiopathic holes had better visual prognosis than traumatic holes. Following surgery, the diameters of the macular holes were significantly decreased in eyes with postoperative visual improvement, and significantly increased in eyes with decrease in visual acuity. The diameter of a macular hole is a good indicator for the correlation of vision in macular hole surgery. Initial visual acuity and stage of macular holes were the most significant prognostic factors.
Humans ; Prognosis ; Retina ; Retinal Perforations* ; Visual Acuity