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PubMedDate not supplied

[Photocoagulation in the prevention of retinal detachment in perforating injuries of the eye caused by warfare].

Main indications for application of photocoagulation in the prevention of retinal detachment in penetrating eye war injuries were presented. Photocoagulation was performed when intrabulbar foreign body was present, before its extraction and in the cases of traumatic ruptures of sectorial traumatic tractional retinal detachment. Modified photocoagulation by argon laser, with linked spots in two rows was used since it was shown to be clinically the most suitable.

Eye Foreign Bodies↗
PubMed1991

[Retinal detachment after perforating eye injuries. IV. Anatomic and functional results of cryosurgical procedures].

In the course of ten years the authors operated 69 patients with detachment of the retina (DR) after perforating eye injuries, using cryosurgical methods with silicone episcleral implants. In 37 patients DR developed after simple perforation (group A) and in 32 patients after perforation of the eye with an intraocular foreign body (group B). In all patients the perforation affected the vitreous space. From the total number of patients anatomical apposition of the retina was achieved in 62.3%. A significant difference is the poorer anatomical result of the operation in the group with simple perforations without a foreign body 54.0%, as compared with the group after perforation with a foreign body, 71.9%. The anatomical results were evaluated with regard to the period of DR, aphakia, the characteristic of the retinal defect, the type of LR and the extent of the operation. From the total number of successfully operated patients we recorded the same or better vision in 44.2% and in 51.2% poorer vision, as compared with that after the perforating injury of the eye. Deterioration was caused by the duration of DR, detachment of the macular region, an extensive operation and complications.

Adolescent↗
PubMed2006

Inadvertent scleral perforation in eye muscle versus retinal detachment buckle surgery.

PURPOSE: Inadvertent scleral perforation is a recognized complication of eye muscle and retinal detachment buckle surgery. If these operations are performed by the same surgeon, it is unknown which of these procedures has a higher risk of scleral perforation. METHODS: In the period from 1999 until 2004, 427 eyes of 317 patients were operated using eye muscle surgery and 81 eyes of 80 patients with retinal detachment buckle surgery. All operations were performed by the same surgeon (JK). In a retrospective, single-center, comparative, observational study, the records of these patients were assessed to determine the number of scleral perforations with retinal damage or drainage of subretinal fluid. RESULTS: In the group receiving retinal detachment buckle surgery there were two cases of scleral perforation. In one case, scleral perforation occurred during buckle installation and in the other case during placement of a cerclage. The rate of scleral perforation was 2.5 % per patient and per eye in this group. In the group receiving eye muscle surgery no scleral perforations occurred. CONCLUSION: The number of scleral perforations was higher in retinal detachment buckle surgery than in eye muscle surgery, with all procedures having been performed by the same surgeon.

Adult↗
PubMed2004

Migration of retinal cells through a perforated membrane: implications for a high-resolution prosthesis.

PURPOSE: One of the critical difficulties in design of a high-resolution retinal implant is the proximity of stimulating electrodes to the target cells. This is a report of a phenomenon of retinal cellular migration into a perforated membrane that may help to address this problem. METHODS: Mylar membranes with an array of perforations (3-40 microm in diameter) were used as a substrate for in vitro retinal culture (chicken, rats) and were also transplanted into the subretinal space of adult RCS rats. A membrane was also constructed with a seal on one side to restrict the migration. RESULTS: Retinal tissue in vitro grew within 3 days through perforations of greater than 5 microm in diameter when the membranes were positioned on the photoreceptor side, but no migration occurred if the implant was placed on the inner retinal surface. Histology with light microscopy and transmission electron microscopy (TEM) demonstrated that migrating cells retain neuronal structures for signal transduction. Similar growth of RCS rat retinal cells occurred in vivo within 5 days of implantation. A basal seal kept the migrating tissue within a small membrane compartment. CONCLUSIONS: Retinal neurons migrate within a few days into perforations (> 5 microm in diameter) of a membrane placed into the subretinal space. This may provide a means of gaining close proximity between electrodes in a retinal prosthetic chip and target cells, and thus allow a greater density of stimulating elements to subserve higher resolution. Further studies are needed to explore the long-term stability of the retinal migration.

Animals↗
PubMedDate not supplied

Successful treatment of rhegmatogenous retinal detachment secondary to globe perforation during peribulbar injection in a case of sympathetic ophthalmia.

Rhegmatogenous retinal detachment followed peribulbar injection in a patient with preexisting sympathetic ophthalmia. Inadvertent globe perforation resulted in subsequent rhegmatogenous retinal detachment. Scleral buckling and pars plana vitrectomy reattached the retina. The histopathology of the subretinal fibrotic tissue confirmed the diagnosis.

Adult↗
PubMed1975

Retinal opacification after blunt non-perforating concussional injuries to the globe. A clinical and retinal fluorescein angiographic study.

Fluorescein angiographic studies are reported on fifteen patients presenting with retinal opacification after blunt mechanical non-perforating injuries involving the eye. In patients who subsequently regained full visual function and in whom complete resolution of the retinal changes occurred, retinal fluorography carried out less than 24 hours after injury revealed no abnormal features. In cases with more prolonged visual disability, retinal fluorescein examinations may, however, reveal damage to the retinal pigment epithelium before this becomes apparent on routine ophthalmoscopy, or the existence of impaired perfusion through the retinal vessels. It is suggested, therefore, that retinal fluorescein angiography has a role in assessing the visual prognosis in patients presenting with traumatic retinal oedema.

Adolescent↗