A Study of Factors Related to Surgical Success Rate of Dacryocystorhinostomy

To evaluate factors related to success rate of dacryocystorhinostomy, we retrospectively surveyed 131 eyes about age, sex, symptom duration, etiology, obstruction site, sac size, silicone tube insertion and surgeons learning curve. Patients age, sex, obstruction site and sac size were not related to surgical results, but longer duration of epiphora, trauma, silicone intubation and poor surgical skill had relationship with poor surgical results. Surgical skill was the most important factor in multiple logistic regression. We believe that surgical technique for making a mucosal flap with bone removal etc., was very important to surgical success.

Detection of Human Papillomavirus in Recurrent Conjunctival Papilloma

The human papillomavirus(HPV) has been implicated in the pathogenesis of human conjunctival papilloma, becauses it has clinically viral nature and pathologically koilocytosis, typically found in other papilloma-induced tumors. To evaluate the association of HPV with conjunctival papilloma, 3 recurrent conjunctival papiloma were removed through cryo-excision and examined for the presence of human papillomavirus by polymerase chain reaction. All 3 cases were positive reactions to papillomavirus serotype 6/11, but koilocytosis was present in 2 cases.

Intravitreal Phacofragmentation

We reviewed the records of seven patients who underwent pars plana vitrectomy and intravitreal phacofragmentation for removal of posteriorly dislocated lenses from September 26, 1994. to January 12, 1995. More than half volumes of crystalline lenses were dislocated during cataract extraction in four eyes, and all three eyes of dislocated lenses with intact capsules had a history of blunt trauma. Five eyes had visual acuity of 15/20 or better at 3 months after removal of intravitreal crystalline lenses. But two eyes, undergone excessive manipulation for removing intravitreal nuclear fragments via the limbus during cataract operation, had 4/20 vision with complication of retinal or choroidal detachment. These results suggest that the overall prognosis for visual recovery after pars plana vitrectomy and phacofragmentation for removal of intravitreal crystalline lens, is quite good if there were no excessive attempts to remove intravitreal lens fragment during cataract extraction.

Pars Plana Vitrectomy Combined with Anterior Capsule-Sparing Lensectomy Clinical Report of 43 Cases

We performed pars plana vitrectomy combined with anterior capsule-sparing lensectomy on forty three eyes WJth coexisting cataract and vitreoretinal disease and followed up more than 6 months. Preoperative vitreoretinal diseases consisted of nondiabetic vitreous hemorrhage (thirteen eyes), retained metallic intraocular foreign bodies (nine eyes), posterior uveitis (nine eyes), proliferative diabetic retinopathy (seven eyes) and rhegmatogenous retinal detachment (five eyes) . Thirty six eyes (84%) revealed the visual acuity of 0.1 or less before operation. Thirty eight eyes (88%) could get a better visual acuity after operation than before operation. Posterior chamber intraocular lenses were implanted to thirty eight eyes. The severity of anterior capsular opacity showed a statistically significant difference between the eyes with injection of intraocular gas or silicone oil and them without injection of that (p=0.004). In this study, we can find that the technique of pars plana vitrectomy combined with anterior capsule-sparing lensectomy would be recommendable and the anterior capsular opacity may have relation with intraocular gas or silicone oil.

Radiological Analysis of Aging Changes of the Lumbar Intervertebral Disc / 체질인류학회지

The present study was carried out to clarify the anatomical changes of lumbar intervertebral discs by aging. Anterior height, posterior height, anteroposterior diameter of intervertebral discs were measured on 512 normal plain lateral radiographs of lumbosacral spine. And the indices of disc wedging and relative disc height were calculated. There was a cephalocaudal gradient of increase in the indices of disc wedging in all age groups. The indices of relative disc height were constant at all lumbar levels. These suggest that the lower disc is more wedge shaped and the height of discs changes in the constant ratio with that of vertebral body.

Ultrastructural Study on the Development of Ciliary Body in Human Fetuses

Morphological development of the ciliary body was studied by electron microscope in human fetuses from 50 to 260 mm crown-rump length(11-30 weeks of gestational age). At a 50 mm(11 weeks) fetus, the anlage of ciliary body was not appeared. At a 70 mm(13 weeks) fetus, the anlage of ciliary epithelium was appeared as the folds were formed by invaginating vessels in the basal surface of pigmented epithelium at the rim of optic cup. At the time, the anlage of ciliary muscle was formed as the mesenchymal cells, which located between the rim of optic cup and the scleral condensation, different-iate into the myoblasts, and the unmyelinated nerve fibers and the axon terminals were found in the interstitial tissue of mesenchyme. At 100-260 mm(15-30 weeks) fetuses, the myoblasts of ciliary body continued to develop into typical smooth muscle cells. At 200-260 mm(20-30 weeks) fetuses, the well-developed infoldings in the basal lamina and the well-developed interdigitations in the lateral sur-face were observed at both pigmented and nonpigmented epithelia. At the time, ganglion cells, Schwan cells and axon terminals were observed in the interstitial tissue of ciliary muscle.