introduction : laser therapy prevents complications of proliferative diabetic retinopathy (pdr), central retinal vein occlusion (crvo) and branch retinal vein occlusion (brvr), but its effect on visual acuity is controversial. this study evaluated the effect of laser on visual acuity in these patients. materials and methods: this interventional study conducted before–after treatment and evaluat...

PURPOSE To describe the time course of microvascular changes after transient branch retinal vein occlusion (BRVO) in rats. METHODS BRVO was induced in pigmented rats by focal laser photocoagulation. The subsequent changes in the retinal angiogram were followed up, both in vivo by confocal scanning laser ophthalmoscopy and ex vivo by confocal microscopy. RESULTS At day 1, capillary closure a...

results in all groups ischemic changes were apparently observed in hippocampus ca1 neurons. in two-vessel occlusion model, after 3 and 24 hours of reperfusions, ischemic cells accounted for 14.9% and 23.2%, respectively. in four-vessel occlusion model, after 3 and 24 hours of reperfusions, ischemic cells accounted for 7.6% and 44.9% (p < 0.0001), respectively. background an appropriate animal m...

THERE is convincing clinical evidence that retrolental fibroplasia is the result of a disturbance of the oxygen conditions to which an infant is normally exposed. Direct experimental evidence of this was supplied by Ashton and others (1953), the anatomical studies of Michaelson (1948) and the physiological studies of Campbell (1951) having previously suggested the significance of the role of ox...

Purpose We investigated the pathophysiology of branch retinal artery occlusion (BRAO) by evaluating the retina, brain, and carotid artery in patients with BRAO. Methods This study was a retrospective registry study. We used 46 eyes from 46 patients with acute BRAO and evaluated the medical history, including previous cardiovascular disease, and compared brain magnetic resonance images (MRI) a...

purpose: to evaluate total plasma homocysteine level during the acute phase of central retinal vein occlusion (crvo) compared with a matched healthy group in iranian population, and determine whether hyperhomocysteinemia is also a risk factor for crvo. methods: a study group contains 54 patients presenting with crvo in recent one month, acute phase of the decease, was compared for fasting total...

purpose: doing plyometric training with and without the vessel occlusion is an effective practice for rapid increase of muscles strength their hypertrophy. we evaluated the effects of plyometric training with and without the vessel occlusion on electromyographic parameters. methods: in this quasi-experimental study, 22 females were selected through convenience sampling method. they were randoml...

Retinal vessels of 18 adult domestic cats were successfully embolized with graded glass microspheres, and the resultant vascular changes were monitored clinically by ophthalmoscopy. At specific times the cats were killed, their eyes were enucleated, and digest preparations of the vessels were made from each retina. The preparations were examined microscopically, and any alterations in vasculatu...

BACKGROUND Retinal vascular diseases are one of the most common causes of blindness in the developed world. Optical Coherence Tomography Angiography (OCT-A) is a new noninvasive method that uses several algorithms to detect blood movement. This enables the creation of high-resolution vascular images with contrast depicting motionless tissue. METHODS This review presents the results of article...