No abstract available.
Retinal Detachment* ; Retinal Perforations* ; Retinaldehyde*

No Abstract Available.
Retinal Detachment* ; Retinal Perforations* ; Retinaldehyde*

No abstract available.
Retinal Perforations* ; Ulnar Neuropathies*

In 10 patients who complained of photopsia or "spots before their eyes", indirect ophthalmoscopy with scleral depressor was performed very carefully. In 7 out of 10 of these patients, we found retinal holes which were not easily detectable. Also, on 3 of these 7 patients, prophylactic cryopexy was performed. Therefore, we feel that indirect ophthalmoscopy should be done not only on patients who present these symptoms, but this examination should also be performed on asymptomatic patients as well.
Humans ; Ophthalmoscopy ; Retinal Perforations

Idiopathic macular holes are believed to arise from traction of the posterior vitreous membrane. Traditionally, macular holes have been considered as untreatable condition, but recently vitreous surgeries are being attempted to manage them. Pars plana vitrectomy in conjunction with separation of the posteror vitreous membrane and intraocular achieve visual improvement and anatomic reattachment in eyes with full thickness macular hole. A total of 9 eyes which included 2 eyes with stage 2 macular hole and 7 eyes with stage 4 macular hole underwent vitrectomy. The macular holes were successfully occluded in all 9 eyes and visual improvement of two lines or more was achieved in 6(67%) in which symptom duration was 3 months or less and/or hole size was 1/3DD or smaller. These results suggested that the full thickness macular holes would be surgically treatable lesions and better visual results can be expected in cases with shorter duration and smaller size.
Membranes ; Retinal Perforations* ; Traction ; Vitrectomy

No abstract available.
Glaucoma, Angle-Closure ; Retinal Perforations

Human ; Female ; Middle Aged ; RETINAL NEOVASCULARIZATION ; RETINAL NEOVASCULARIZATION/SURGERY ; RETINAL PERFORATIONS ; RETINAL PERFORATIONS/SURGERY ; HUMAN ; FEMALE

Effect of silicone oil in vitreous cavity of the rabbit was studied with electroretinogram. Pars plana vitrectomy was performed bilaterally in nine white rabbits, and they were divided into 3 groups. 1.6~1.7 cc of silicone oil was injected in right eye in 1st group, 0.8 cc of silicone oil was injected in right eye in 2 nd group, and 0.8~1.0 cc of silicone oil was injected in right eye after retinal tear was made in 3 rd group. Left eye in each group was used as a control. Photopic and scotopic electroretinographic studies were performed in both eye of rabbits preoperatively and postoperatively 2 days, 1 week, 2 weeks, 3 weeks, and 4 weeks. In each group, a and b-wave amplitude was decreased in silicone oil injected eye compared to control eye at postoperative 2 days, and was increased to normal amplitude at postoperative 4 weeks in both photopic and scotopic electroretinograms. Implicit time of a and b-wave was not affected in each group. Above results suggest that rabbit electroretinogram is not affected by intravitreal silicone oil until postoperative 4 weeks.
Rabbits ; Retinal Perforations ; Silicone Oils* ; Vitrectomy

PURPOSE: To evaluate macular function before and after surgical closure of idiopathic macular hole using multifocal electroretinogram (mfERG). METHODS: The mfERGs were performed on nine patients, who had been diagnosed with idiopathic macular hole, before and after vitrectomy (average 2.9+/-0.6 mo) and gas (C3F8) injection. VERISTMsystem (EDI: San Mateo, CA, USA) was used to record the mfERGs. The central 30 degrees of the ocular fundus were stimulated by an array of 103 hexagonal elements for 4 minutes. The responses of six concentric rings (rings 1 to 6) radiating from the foveal center were averaged. Preoperative and postoperative responses of mfERG were compared. Statistical differences were analyzed with the paired two sample t-test. RESULTS: N1, P1 and N2 amplitudes of rings 1 and 2 increased after surgery significantly (p<0.05). N1, P1 and N2 latencies mostly decreased after surgery, but these results were not significant (p>0.05). The changes of mfERG responses were not correlated with the changes of visual acuities after surgery. Visual acuity was improved in seven patients but deteriorated in the other two, one of whom developed RPE degeneration and another cataract. CONCLUSIONS: The mfERG responses improved after macular hole surgery. These results suggest that mfERG may be a useful method to assess macular function changes after macular hole surgery, although the responses were not correlated with visual acuity.
Cataract ; Humans ; Retinal Perforations* ; Visual Acuity ; Vitrectomy

PURPOSE: In this study we compared the postoperative hole closure rate and average vision between a group who assumed a face-down position for a week using gas and a group who assumed a reading position after fluid air exchage (FAX), both after receiving internal limiting membrane (ILM) peeling during vitrectomy in patients with idiopathic macular hole. METHODS: This study included 25 eyes of patients diagnosed with idiopathic macular hole that underwent vitrectomy. Group I assumed a face-down position for a week after intraocular gas tamponade after FAX during vitrectomy and Group II assumed a reading position for 3 days after only FAX. The hole closure rate and the best-corrected visual acuity (BCVA) were compared between the 2 groups 6 months postoperatively. RESULTS: The preoperative mean macular hole size was 456.2 +/- 164.1 microm in Group I and 411.2 +/- 105.7 microm in Group II and the differences between the 2 groups were not statistically significant (p = 0.647). At 6 months after surgery, the macular hole closure rate was 93% in Group I and 100% in Group II (p = 0.571) and the BCVA (log MAR) was 0.82 +/- 0.29 preoperatively and 0.92 +/- 0.35 postoperatively in Group I and 0.71 +/- 0.39 and 0.97 +/- 0.33 in Group II, respectively. The differences between the 2 groups (p = 0.09, p = 0.058) were not statistically significant (p = 0.809, p = 0.267). CONCLUSIONS: There was no significant differences in the macular hole closure rate and BCVA improvement after 6 months in patients with idiopathic macular hole who had FAX during vitrectomy and maintained only a reading position for 3 days compared with those with gas tamponade and who maintained a face-down position for a week. This surgical method is considered helpful for easing discomfort caused by a face-down position after the macular hole surgery.
Humans ; Membranes ; Retinal Perforations* ; Visual Acuity ; Vitrectomy