OCCLUSION of the central retinal vein causes incomplete haemorrhagic infarction of the inner layers of the retina. Haemorrhagic infarction describes a situation in which the venous backflow of an area of tissue is interrupted. As a result the flow of blood has to stop; ischaemia and resulting increase of vascular permeability lead to retinal oedema and extensive haemorrhages. The central retina...

Branch and hemisphere vein occlusion were produced in rhesus monkeys by argon laser photocoagulation. The following observations were made: (1) Immediately after occlusion there was venous dilatation, delayed filling of the artery, delayed drainage by the occluded vein, and capillary leakage. (2) Two patterns of evolution were identified within the first week. In some animals the fundus changes...

OBJECTIVE To investigate the response of retinal vessel diameters to photocoagulation treatment and their role for the success of laser treatment in patients with retinal vein occlusion. METHODS The study included 14 patients with branch vein occlusion or macular vein occlusion. The ophthalmologic examination included best-corrected visual acuity, biomicroscopy, fundus photography, and fluore...

The purpose of this study was to evaluate the impact of intravitreal dexamethasone implant (Ozurdex) on macular morphology and functions in eyes with macular edema (ME) secondary to retinal vein occlusion. Efficacy outcomes of the treatment were best-corrected visual acuity (BCVA) and central retinal thickness (CRT). Safety outcomes were intraocular pressure and cornea endothelial cell density....

Retinal vein occlusion as a vasooclusive disorder of the retinal vein is the most common visually disabling disease affecting the retina after diabetic retinopathy, and is a frequent cause of vision loss and even blindness. Although it is more common in the middle-aged and elderly population, no age group is immube to it. The retinal vein occlusion pathogenesis has varied systemic and local imp...

Retinal vein occlusion is a common retinal vascular disorder causing visual deterioration in the elderly. Vision-threatening complications include macular ischemia, neovascularisations, and vitreous hemorrhages. There are central and branch retinal vein occlusions as well as their ischemic and nonischemic subtypes. Branch occlusion and nonischemic cases are associated with better prognosis, oft...

OBJECTIVE To describe a novel missense mutation in the antithrombin gene associated with antithrombin deficiency type I in a 40-year-old man with retinal vein occlusion. DESIGN Investigational case report. RESULTS Ophthalmoscopy of the right eye showed hemicentral retinal vein occlusion. The patient's medical history was negative for glaucoma or cardiovascular risk factors. Screening for th...

Primary antiphospholipid syndrome (APS) is a disease producing vascular thrombus with antiphospholipid antibody without association with autoimmune diseases as systemic lupus erythematosus. Retinal vein occlusion is a rare vascular manifestation in primary APS. We describe 2 cases of primary APS presenting with developing blurred vision. Each had central retinal vein occlusion and high titer of...