AC/A ratio of alternating fixation metbod(AF) using Major Amblyoscope was compared with that of simultaneous fixation method(SF). Under SF, AC/A ratio was greater than that of AF and standard deviation of both method was not significantly different. This indicates tbat AC/A ratio of SF was not accurate, because fusional convergence was invariably participated. Therefore, when we measure the AC/A ratio by tbe gradient method using the Major Amblyoscope, AF was desirable.

AC/A ratio of alternating fixation metbod(AF) using Major Amblyoscope was compared with that of simultaneous fixation method(SF). Under SF, AC/A ratio was greater than that of AF and standard deviation of both method was not significantly different. This indicates tbat AC/A ratio of SF was not accurate, because fusional convergence was invariably participated. Therefore, when we measure the AC/A ratio by tbe gradient method using the Major Amblyoscope, AF was desirable.

No abstract available.

No abstract available.
Animals ; Brain* ; Carbon Monoxide* ; Carbon* ; Rats*

No abstract available.
Humans

The formation of cysts in the parameatal area has been reported as rare. A parameatal urethral cyst is a congenital anomaly and has been reported even more rarely in adults. In this study, we present two cases of parameatal urethral cyst and aim to investigate their causes and treatment methods. The extent of cyst spread was assessed using a urethroscope prior to cyst excision, and the excision range was determined accordingly. Complete excision of the cyst was performed as the treatment for parameatal urethral cyst. Both patients were adults who presented with urinary symptoms related to the cyst, necessitating the excision of the congenital parameatal urethral cyst.

Central serous chorioretinopathy is a relatively good prognosis. But certain patients present poor visual outcome. To clarify the courses and factors that affect final visual outcome, 36 patients who did not receive any treatment were studied respectively. The smoke stack type of leakage was more frequently noted in fresh cases. The courses of the disease were similar in spite of difference of type of leakage. The type of leakage did not affect both the initial and final visual acuity. And among the cases with poor visual outcome, there were noted other lesions such as pigment epithelial decompensation, choroidal atrophy and subretinal neovascular membrane.
Atrophy ; Central Serous Chorioretinopathy* ; Choroid ; Humans ; Membranes ; Prognosis ; Smoke ; Visual Acuity

Branch retinal vein occlusion is a disease of relatively good prognosis concerning visual acuity. We have studied 33 patients with temporal branch retinal vein occlusion who have not been treated to investigate the cause of branch retinal vein occlusion and poor visual outcome. The possible causes were as follow; Hypertension was found in 25 patients, hyperlipidemia in two, adiposity in one, Diabetes Mellitus in one and unknown causes in 4 patients. Among those twenty five patients who have hypertension, 6 of them showed eleveted systolic blood pressure, while diastolic blood pressure remains normal, suggesting that high systolic pressure might be a more significant factor than diastolic pressure. Poor visual outcome has been found in eight patients. Four as chronic macular edema. Two has preretinal membrane and remaining two has vitreous opacity and macular hole, respectively. In overall, better prognosis has been observed in inferotemporal branch retinal vein occlusion than insuperotemporal branch retinal vein occlusion. Also, patients who did not have macular hemorrhage had better visual outcome than those who had.
Adiposity ; Blood Pressure ; Diabetes Mellitus ; Hemorrhage ; Humans ; Hyperlipidemias ; Hypertension ; Macular Edema ; Membranes ; Prognosis ; Retinal Perforations ; Retinal Vein Occlusion* ; Retinal Vein* ; Retinaldehyde* ; Visual Acuity

No abstract available.
Decompression* ; Follow-Up Studies* ; Spine* ; Titanium*

Among the 98 patients who underwent operations for thoracolumbar spinal lesions from May 1989 to September 1994, the authors performed clinical analysis of 72 patients who were followed-up for more than 12 months. There were 52 cases of trauma, 18 cases of tuberculous spondylitis, and 2 cases of metastatic tumor. After partial or toal vertebrectomy, interbody fusion was performed using autogenous iliac bone or autogenous ribs which were taken while approaching the thoracic spine, and stabilized using Kaneda devices. Complete neural decompression was possible under direct vision in all cases. Neurologic deficits improved to an average of 1.7 grades using a modified Frankel scale. Patients with tuberculous spondylitis did not show recurrence or any evidence of increased risk of secondary infection caused by instrumentation. Loosening or breakdown of instruments occurred in 4 patients, and spinal deformity in 7 patients, but reoperation was not needed in any of these patients. By anterior decompression, interbody fusion and stabilization using Kaneda device in thoracolumbar spinal lesions, we could obtain satisfactory neurologic improvement as well as immediate firm stability and high fusion rate involving only a minimum(usually two) number of motion segments as compared with the posterior approach.
Coinfection ; Congenital Abnormalities ; Decompression ; Humans ; Neurologic Manifestations ; Recurrence ; Reoperation ; Ribs ; Spine ; Spondylitis