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Results for “Retinal Perforations”

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At least 163 records · Page 9Linked to original sources
PubMedDate not supplied

[Vitreoretinal proliferation as a cause of tractional retinal ablation after severe perforating injury].

The main idea of this paper was to investigate the influence of proliferative reaction in vitreous body, in case of serious injuries of the eyeball on the development of complications. It was shown that the presence of hemophthalmia which intensified PVR process and anteroposterior traction influenced the intensity of PVR and also the development of retinal ablation. The complete perforation of the posterior wall of the eye ball (duplex perforation) with the small foreign body would produce bigger scar on the posterior wall than in case of singular perforations, which would usually be enough to control anteroposterior traction towards vitreous body and prevent retinal ablation.

Adolescent↗
PubMed1995

Retinal detachment secondary to ocular perforation during retrobulbar anaesthesia.

The clinical characteristics and the retinal breaks associated with rhegmatogenous retinal detachments secondary to accidental globe perforation during local infiltration anaesthesia in five highly myopic eyes are presented. Retinal detachment was total with variable proliferative vitreoretinopathy. The pattern of retinal breaks was rather typical and predictable. Management involved vitreous surgery with internal tamponade by silicone oil in four eyes and perfluoropropane gas in one eye. At the last follow-up, all eyes had attached retina. One eye did not recover useful vision due to possible concurrent optic nerve damage.

Anesthesia, Local↗
PubMed1978

Ocular perforation following retrobulbar anesthesia for retinal detachment surgery.

We encountered three examples of the perforation of the globe by the retrobulbar needle in a series of 4,000 patients who had undergone retinal reattachment surgery with local anesthesia. The presence of significant myopia was a contributing factor in all three cases. We managed the perforation site through the detached retina with cryopexy and external tamponade, and we treated perforations through the attached retinas either with cryopexy at surgery or photocoagulation postoperatively.

Adult↗
PubMed1997

Corneal perforation associated with argon laser photocoagulation for a retinal tear.

PURPOSE: To report a corneal perforation during argon laser photocoagulation around a retinal tear following pneumatic retinopexy. METHODS: The patient was examined and found to have a corneal perforation with pigment in the base of the wound. To help explain this phenomenon, we evaluated the ability of argon blue-green laser to create a corneal perforation in a cadaver eye. RESULTS: In a cadaver eye, we induced a corneal perforation with argon laser only when a pigmented substance was present on the corneal surface. CONCLUSIONS: We hypothesize that pigmented material such as an eyelash or mascara caught between the cornea and contact lens interface may have facilitated this rare complication. Clinicians should be wary of any pigmented substance on the surface of the cornea or ophthalmoscopic lens when performing argon laser photocoagulation.

Aged↗
PubMedDate not supplied

[Classification of idiopathic macular ruptures].

Based on comprehensive examinations making use of optic coherent tomography, idiopathic macular ruptures were classified (by severity) as pre-ruptures, lamellar and perforating ruptures. A 10-point scale is proposed for quantitative analysis of ruptures. Regularities in retinal changes characteristic of each type of ruptures are detected. This helps accurately evaluate the rupture, choose treatment strategy, and evaluate its results.

Aged↗
PubMedDate not supplied

Ocular perforation during retrobulbar and peribulbar injections.

BACKGROUND AND OBJECTIVE: To determine the ocular perforations during retrobulbar and peribulbar injections. PATIENTS AND METHODS: Twenty-five ocular perforations between 1976 and 1993 occurred after 13 retrobulbar and 12 peribulbar injections. Eighteen patients (72%) were women. Eighteen eyes were myopic (72%). Risk factors included high myopia in 11 cases (44%), use of Atkinson gaze in 21 cases (84%) and a sharp injection needle. RESULTS: Deep position of the posterior pole was common. Perforation signs comprised vitreous hemorrhage in 25 eyes (100%), subretinal hemorrhage in 19 eyes (76%), retinal breaks along the inferior vascular arcade in 19 eyes (76%), and retinal detachment in 14 eyes (56%). Proliferative vitreoretinopathy developed in 11 eyes (44%). CONCLUSION: Retinal detachment strongly correlated to poor visual outcome.

Adolescent↗
PubMed1990

[Retinal detachment following blunt trauma].

In the first part of this study a description of the different types of ocular trauma is given. This is followed by the pathogeny of retinal detachment after blunt trauma. Then the specific characteristics of the tears and other signs of non-perforation traumatic retinal detachment are discussed. Finally a description is given of the operative technique used in those cases.

Contusions↗
PubMed2007

Surgical induction of choroidal neovascularization in a porcine model.

PURPOSE: To develop a reproducible surgical technique for the induction of choroidal neovascularization (CNV) in the subretinal space of porcine eyes and to analyse the resulting CNV clinically and histologically. METHODS: Two different modifications of a surgical technique previously described were compared with the original method. In ten porcine eyes retinal pigment epithelial (RPE) cells were removed using a silicone tipped cannula, in ten porcine eyes Bruch's membrane was perforated once with a retinal perforator without prior RPE removal and in ten eyes RPE removal was followed by a single perforation of Bruch's membrane. Fifteen of the eyes, five from each group, were enucleated 30 minutes after surgery, while the remaining eyes were enucleated after 14 days. Prior to enucleation, at day 14, fundus photographs and fluorescein angiograms were obtained. Eyes were examined by light microscopy and by immunohistochemical staining. In addition to these 30 eyes, two eyes underwent surgery with the purpose of subsequent scanning electron microscopic (SEM) examination. RESULTS: In eyes enucleated immediately after surgery neuroretinas overlying the induced lesions were intact without apparent atrophy of cells regardless of the surgical technique applied. The process of RPE removal was found to induce breaks in Bruch's membrane and both the size and the number of breaks varied between eyes. CNV membranes were identified in 15 of 15 eyes enucleated after 14 days. CNV membranes induced by perforation of Bruch's membrane without prior RPE removal were significantly thicker than membranes from eyes undergoing both RPE removal and Bruch's perforation (p = 0.03) and also thicker than membranes from eyes with only RPE-removal (p < 0.01). CNV membranes from eyes with perforation of Bruch's membrane without prior RPE removal had a higher cellular content and were more richly vascularized and also exhibited the highest propensity to leak in fluorescense angiograms. CONCLUSION: All three surgical techniques were capable of inducing CNV, but the one applying perforation of Bruch's membrane without RPE removal was easier to reproduce and involved fewer variables than the techniques utilizing RPE removal. The presence of RPE cells seems to affect both the morphology and cellular composition of induced CNV.

Animals↗