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

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

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*

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*

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*

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*

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

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

Retinal photocoagulation using MDS 90 Dye laser system was applied to the retina of normal pigmented rabbits(200 microgram in spot size, 0.2sec in exposure time, 200-300mW in power, 514nm in wavelength, and one spot size distance) with different number of spots and the changes of intraocular pressure(IOP) were compared with each other. The IOP was checked at pre-photocoagulation, immediately after, and 1, 2, 3, 4 hours after photocoagulation. The following results were obtained: 1. The IOP immediately after photocoagulation was lower than the pre-photocoagulation IOP. 2. The IOP 1, 2 hours after photocoagulation was higher than the pre-photocoagulation IOP. 3. The IOP 2 hours after photocoagulation was the highest. 4. The IOP 1, 2 hours after photocoagulation was higher when the laser spot number was 2000 than 1000, 500, and there was no difference of IOP between 1000 and 500 laser spot numbers. 5. The IOP returned to the pre-photocoagulation level 3 or 4 hours after photocoagulation.
Intraocular Pressure* ; Lasers, Dye ; Light Coagulation ; Retina ; Retinaldehyde*

PURPOSE: To describe the clinical course of three eyes of three patients that underwent surgical ablation as treatment of retinal angiomatous proliferation (RAP). METHODS: Surgical lysis of the retinal feeding arteriole and draining venule was done in two eyes that had stage 2 RAP with serous pigment epithelial detachment (PED). It was done as the first treatment modality in one eye, and after failure of laser photocoagulation in the other. It was also performed in another eye presumed to have very early stage RAP that showed only retinal-retinal anastomosis without any definite intraretinal or subretinal angiomatous lesion. RESULTS: PED decreased within 1 month after ablation in the two eyes with stage 2 RAP, but new anastomoses eventually developed after 1 month, followed by progression of the lesions. In the eye with presumed early stage RAP, successful lysis of retinal-retinal anastomosis was maintained and initially showed no signs of further proliferation at the original lesion site; however, four months later, hemorrhagic PED developed distally and progressed further to retinal pigment epithelial tear and massive subretinal hemorrhage. CONCLUSIONS: Surgical ablation may be unable to halt the progressive nature of neovascular proliferations in RAP.
Arterioles ; Hemorrhage ; Humans ; Light Coagulation ; Macular Degeneration ; Retinaldehyde* ; Venules