An Experimental Study of Noncontact Transscleral Diode Laser Cyclophotocoagulation in Rabbits

Acute and long-term effects of the noncontact transscleral diode laser cyclophotocoagulation were studied in 6 pigmented rabbits used laser power level was 0.15J, 0.25J, 0.5J and 0.75J. Each eyeballs was enuleated 1.7 and 21 days after cyclophotocoagulation for histopathologic examination. The findings with diode laser were coagulation necrosis of pigmented epitihelium, nonpigmented epitihelium and stroma, congestion of vessel, pigment dispersion and detachment of pigment epithelium. Twenty one days after laser treatment, the light microscopic examination revealed atrophy of nonpigmented epithelium and pigmented epithelium, fibrosls, pigment laden macrophages. These changes were obvious in rabbits treated with a power more than 0.5J. It is suggested that noncontact trasnscleral cyclophotocoagulation with diode laser is useful in lowering intraocular pressure.

Clinical Results of 200 Cases of Posterior Chamber Lens Implantation

From June 1982 to Feb. 1987, 250 cases of planned ECCE with posterior chamber lens implantation were performed in Koryo General Hospital. Among them, 200 cases had been followed up for more than 2 months. The results were as follows: 1. Among 200 cases, the most prevalent age groups were age 40s to 50s for men(103 cases, 64.4% of 160 male cases) and age 60s to 70s for women(32 cases, 80% of 40 female cases). The mean age was 49.67 years for men and 65.84 years for women. 2. Before the operation, diabetes mellitus and hypertention were shown to be the most common systemic diseases, which were found in 8 cases and 6 cases, respectively. Exotropia and macular degeneration were some what more common ophthalmic problems, which were found in 2 cases, respectively. 3. Early postoperative complications were striate keratitis, corneal edema (180 cases, 90%), and uveitis (160 cases, 80%). These figures show that almost all cases have the above complications developed after planned ECCE and posterior chamber lens implantation. 4. Late complications were after cataract(6 cases, 3%) and secondary glaucoma (5 cases, 2.5%). 5. The best corrected visual acuity after operation of 0.5 or better was 84%. 6. The spherical equivalent between -2.00D and emmetropia of postoperative corrective spectacle lens power was composed of 132 cases(66%). 7. Postoperative astigmatism occurred in 103 cases. Among them, the lens power of 0.01 to 1.50D was found in 58 cases(56.3%). The most common axis of astigmatism was 180degree, which appeared in 28 cases.

Clinical Study of IOL Implantation in Diabetes Patients

We performed a retrospective study of 21 diabetes patients among the 500 cases of cataract extraction with IOL implantation. The results were as follows: 1. The length of follow-up ranged from 6 to 41 months. Sex distribution was 15 males and 6 females, and the mean age of patients was 56.9 years. 2. The fundus examination at the time of operation showed that 14 patients had non diabetic retionpathy and 7 patients had background diabetic retinopathy. During the postoperative follow-up period, 2 cases of non diabetic retinopathy proceeded to background diabetic retinopathy. 3. The implanted IOLs were classified into three types: anterior chamber lens(1 eye), iris clip lens(3 eyes) and posterior chamber lens(17 eyes). 4. There was no significant correlation between postoperative complications and diabetes, and steroid induced glaucoma occurred in 3 eyes. 5. The removal of IOL was performed in 3 eyes, and of these one had neovascular glaucoma associated with diabetes. 6. The preoperative visual acuity was mostly below 0.02. After operation, 18 patients obtained corrected visual acuity of 0.5 or better.

A Case of Partial Occlusion of Branch Retinal Artery in Patient with Mitral Valve Prolapse

Authors have experienced a case of retinal occlusion in patient with mitral valve prolapse. The patient was 10-year-old male who had visited our hospital due to the sudden onset of painless diminished vision and visual field defect of right eye since 2 days ago. The funduscopic finding of right eye showed typical appearance of retinal arterial occlusion with ischemic retinal whitening which app3ared as opacification. And, we also found mitral valve prolapse in this patient. One of the recently reported complications of mitral valve prolapse is thromboemboli resulting in cerebral ischemic events and visual complications. Such emboli can explain some cases of branch and central retinal arterial occlusion.

A Case of Meibomian Gland Carcinoma

Adenocarcinoma of the meibomian gland is relatively uncommon. In recent years, the authors have experienced a case of histologically proven meibomian gland adenocarcinoma. This was a 80-year-old female who had a regrowing large mass in the right upper eyelid. She was treated with surgical excision but rejected radiation therapy. A biopsy was performed and the histopathological examination revealed adenocarcinoma of the meibomian gland.