Artificial chorioretinal inflammation was produced by the application of the cryothermy, diathermy, or photocoagulation in man. The inflammatory reactions were followed-up by fluorescein angiography. Inflammatory lesion showed fluorescein leakage and pooling at the first postoperative day Cessation of leakage was seen niter the 10th postoperative dey regardless of method of inflammation production. Pigment stippling was seen at about 4-5 days after moderate to heavy cryo-application, but about 11-12 days after moderate intensity of photocoagulation and diathermy.
Diathermy ; Fluorescein Angiography ; Fluorescein* ; Inflammation* ; Light Coagulation

Circumscribed choroidal hemangioma is a rare, benign, vascular hamartom located frequently at the posterior pole. This may lead to symptomatic visual loss when serous retinal detachment occurs at macular area. WE treated successfully a case of circumscribed choroidal hemangioma associated with serous retinal detachment with laser photocoagulation. So, we report this case with a review of the literatures.
Choroid* ; Hemangioma ; Light Coagulation ; Retinal Detachment* ; Retinaldehyde*

We reviewed 92 eyes(65 patients) of diffuse diabetic macular edema which were treated with grid laser photocoagulation and followed up for more than 4 months from March 1992 to March 1997. There were improvements of visual acuity in 24 eyes(26.1%)and non changes in 50 eyes(54.3%), and 18 eyes(19.6%) showed worsened visual acuity. Initial visual acuity, presence of clinically significant macular edema and severity of retinopathy had not significant effects on visual outcome(P>0.05). Patients with grid photocoahulation without panretinal photocoagulation showed significantly good results than panretinal photocoagulation before or after grid photocoagulation(p<0.05).
Humans ; Light Coagulation* ; Macular Edema* ; Visual Acuity

Optic disc pits are an uncommon congenital anomaly of the optic nerve head. Serous detachment of the macula is a well known complication in patients with an optic disc pit Although spontaneous reattachment has been reported, most eye with macular detachment associated with optic disc pit have a poor visual prognosis inspite of treatments. We have experienced a case of optic disc pit associated with serous macular detachment, that has been treated with argon pure green laser photocoagulation, reporting it with a review of literature.
Argon ; Humans ; Light Coagulation ; Optic Disk ; Prognosis

Diabetic maculopathy which is the major cause of blindness in nonproliferative diabetic retinopathy, has been treated clinically with laser photocoagulation. We reviewed 21 cases(26 eyes) of diabetic maculopathy which were treated by focal laser treatment and followed up for more than 6 months from January 1984 to December 1988. The results were as follows: 1. There was improvement of the visual acuity in 19 eyes(71.1%), no changes in 5 eyes(19.2%), and only two eyes(7.7%) showed worsened visual acuity. 2. The two eyes which showed worsened visula acuity after treatment showed stage IV of diabetic maculopathy.
Blindness ; Diabetic Retinopathy ; Light Coagulation ; Visual Acuity

Authors performed transscleral diode laser retinopexy through the conjunctiva, muscle and silicone scleral exoplant to evaluate its safety and efficacy in experimental rabbit eyes. Transscleral applications required energies of average 325. 2 mWwith duration of 0.5 second. The mean power required to produce comparable lesions through the conjunctiva, muscle and the buckle(MIRA #276)was 27%, 20%, and 33%higher, respectively. These results demonstrate that the diode laser photocoagulation applied through a scleral buckle is capable to produce chorioretinal scars without damaging the scleral tissue nor the buckling elements employed.
Cicatrix ; Conjunctiva ; Lasers, Semiconductor* ; Light Coagulation* ; Silicones*

Subretinal neovascular membrane associated with retinochoroidal colooma is a rare finding. The authors report a case of retinochoroidal coloboma associated with subretinal neovascular membrane, which was treated with Yellow Dye laser photocoagulation (wave length: 590 nm, spot size: 150-200 micro gram, power: 200-300 mW, shooting time: 60, G3 coagulation).
Coloboma* ; Lasers, Dye ; Light Coagulation ; Membranes*

In this study, we evaluated the effect of the argon indirect laser photocoagulation for patients with central serous chorioretinopathy (CSC), whose leaking points were indentified near the fovea or inside the papillomacular bundle. Among the 99 eyes of CSC, 62 eyes were assigned to group one, in which leaking points were located outside the papillomacular bundle or at more than 500 microdistance from fovea, and 37 eyes were assigned to group two, in which leaking points were located inside of papillomacular bundle or within 500 microdistance from fovea. Among the eyes in group one, 22 eyes had undergone direct laser photocoagulation treatment; among the eyes in group two, 27 eyes undergone indirect laser photocoagulation treatment; the rest 50 eyes were untreated. With theses results, We concluded that indirect laser treatment may not be in shortening the duration of central serous chorioretinopathy or in improving the vision. Its reccurence rate was higher than the rest of the modalities.
Argon ; Central Serous Chorioretinopathy* ; Humans ; Light Coagulation*

The aim of this study was to evaluate the histopathologic changes of the pigmented rabbit ratina after endocryopexy. We investigated the differences or similarity among endocryopexy, transscleral cryopexy and laser phocoagulation. Their ultrastructural changes were observed with light and electron microscope. The results were as follows; 1. The first day after endocryopexy, we observed rupture of the internal limiting membrane, breakdown the inner and outer retina, separation of intercellular gap junction of pigment epithelial cells, and accumulation of exudation within subretinal space. 2. In the 8th days, there are mull iplication of retinal pigment epithelial cell layer and development of basal infolding. 3. The present study suggested that effects of endocryopexy on the retina to cause chorioretinal adhesion was similar to transscleral cryopexy or laser photocoagulation However it should be operated on the premise that in requires technical skill for the purpose of clinical application.
Epithelial Cells ; Gap Junctions ; Light Coagulation ; Membranes ; Retina* ; Retinaldehyde ; Rupture

The purpose of the study is to evaluate the effects of calcium dobesilate (Doxium) on the electroretinographic changes in 60 non-insulin dependent diabetic patients with mild to moderate diabetic retinopathy, randomly assigned to receive either oral calcium dobesilate l000mg twice 8 day for 6 months or without medication. And also the effects of blood HbAlc and retinal photocoaglulation on the electroretinographic changes were evaluated. All patients were tested electroretinography with UTAS-2000 (LKC co., USA) before treatment and six months later respectively. The time interval changes of the electroretinogram were analyzed with student t-test program. As a result, no interval changes of the electroretinographic b-wave amplitudes and b/a ratio were noted in both groups, but the oscillatory potentials were significantly decreased after 6 months in the non-treated group (p:0.002). As compared to calcium dobesilate treated group, the non-treated group with blood HbAlc over 6.5mg% (p:0.008) or treated with retinal photocoagulation (p:0.001) showed a significant decrease of the oscillatory potentials. In conclusion, the administration of calcium dobesilate in the patients with diabetic retinopathy prevents an oscillatory potentials reduction, especially in patients with blood level of HbAlc below 6. 5mg% or treated with retinal photocoagulation.
Calcium Dobesilate ; Calcium* ; Diabetic Retinopathy* ; Electroretinography ; Humans ; Light Coagulation ; Retinaldehyde