Endoscopic laser photocoagulation for management of neovascular glaucoma

We used endoscopic laser photocoagulation to treat neovascular glaucoma in eight eyes of seven patients. New vessels of the iris and anterior chamber disappeared or stabilized after photocoagulation in seven eyes (88%), while the vision improved in four eyes (50%). The endoscopy was excellent for observing the peripheral retina and ciliary process tissue. We found the endoscopic laser was suitable for wider photocoagulation of ischemic retina against media opacity.

Reproducibility of Pulsatile Ocular Blood Flow Measurement by OBF Tonograph

To evaluate the reproducibility of pulsatile ocular blood flow(POBF), bilateral POBFs of 10 volunteers were measured 3 times serially by OBF tonograph system(OBF laboratories, UK Ltd.). The POBFs were recorded in sitting position using pneumotonometer attached at slit lamp. After measurement of POBF, intraoculat pressure(IOP) was measured by Goldmann applanation tonometry. Mean values of pulse amplitude(PA), pulse volume(PV), POBF, IOP were 2.0+/-0.4mmHg, 5.1+/-1.5microliter, 701+/-197microliter/min, 13.9+/-2.5mmHg, respectively. Average of standard deviation of POBF was 7.0+/-1.9%. Mean value of IOP using Goldmann applanation tonometry was 12.8+/-2.6mmHg. Coefficient of reliability of the repeated measurement of POBF was 83%, analyzed by intraclass correlation. Coefficient of variation of the repeated measurement of POBF was 5.2%. Linear regression analysis of the Goldmann applanation tonometer on the measurements of IOP witn the tonograph showed a regression coefficient of 0.91. In conclusion, reproducibility of POBF measurement by OBF tonograph was acceptable and compatible with conventional technique. Further studies are required to measure the POBF in glaucoma patients.

One-Year Follow-up of 1000 Cases of Silicone Intraocular Lens Implantation

Implantation of silicone intraocular lens(IOL), which is inserted through a small incision, has as its advantages reduced postoperative astigmatism and early visual rehabilitation. It, however, has such disadvantages as unknown long-term biocompatibility, relatively more Nd:YAG laser-induced damage, and unstable fixation. Another difficulty is the possibility of damage to IOL and intraocular tissue during the process of folding and unfolding of the silicone IOL. One thousand cases of the silicone IOL implantation from Sept. 1993 to Mar. 1996 had been followed-up over 1 tear for intraoperative and postoperative complications. Postoperative conditions such as naked visual acuity, and intraocular pressure were also measured. Postoperative naked visual acuity showed fast recovery, with measurements above 20/50 in 71.8% and 85.1% atk postoperative Day 1 and Day 3, respectively. Intraoperative complication was observed in a single case in which an incomplete continuous curvilinear capsulorhexis resulted in cases(7.8%) of posterior capsule opacification requiring Nd:YAG laser posterior capsulotomy. None of the above 57 cases requiring Nd:YAG laser capsulotomy, however, resulted in reduced visual acuity. Other brane(0.4%), pupillary capture of the optic(0.4%), decentration of the IOL(0.3%) and elevated intraocular pressure(0.3%). The silicone IOL implantation showed early visual rehabilitation without severe intraoperative and postoperative complications.

Endoscopic Laser Photocoagulation for Management of Neovascular Glaucoma

We studies 8 eyes of 7 patients with neovascular glaucoma from June 1, 1995 to May 31 1997 retrospectively in order to note the clinical characteristics of disease. The mean age of the patients was 54. 3 years and the mean period of follow up was 9.5 months. Predisposing factors were proliferative diabetic retinopathy [7 eyes] , central retinal vein occlusion [I eye]. Vision at first visit was mainly hand motion or finger counting. Vision after operation was increased in 4 eyes, but deteriorated to no light perception in 3 eyes. The mean IOP at preoperative period was 35mmHg, at just postoperative period 20mmlHg at I week after operation, 25mmHg at last follow-up. Neovascularization of anterior chamber and angle were regressed in 6 eyes, but progressed in 2 eyes. Additional medical treatment was needed in all 8 eyes after operation. To treat. the early neovascular glaucoma, we used endoscopic laser photocoagulation. The endoscopy was good for observing far peripheral retina, pars plana, ciliary body and posterior segment of iris. We found the endoscopic laser was suitable for wider photocoagulation of ischemic retina against corneal opacity, miosis, cataract and intraocular gas.