with an increasing emphasis on security, automated personal identification based on biometrics has been receiving extensive attention. iris recognition, as an emerging biometric recognition approach, is becoming a very active topic in both research and practical applications. in general, a typical iris recognition system includes iris imaging, iris liveness detection, and recognition. this rese...

Biometric recognition is an automatic identification method which is based on unique features or characteristics possessed by human beings and Iris recognition has proved itself as one of the most reliable biometric methods available owing to the accuracy provided by its unique epigenetic patterns. The main steps in any iris recognition system are image acquisition, iris segmentation, iris norm...

PURPOSE To identify and isolate cDNAs for the alternatively spliced vascular endothelial growth factor (VEGF) mRNAs present in retina and to compare the relative levels of the splice variants and localization of VEGF mRNA in nonischemic and ischemic adult simian retinas. METHODS Retinas of cynomolgous monkeys were made ischemic by laser occlusion of the main branch retinal veins. Reverse tran...

Vascular changes of the iris were studied in 6 patients with chronic anterior uveitis of varying aetiology by means of fluorescein angiography. In 1 case the angiographic findings of the second eye were compared with the histopathological changes in the fellow eye enucleated earlier because of absolute glaucoma. In the milder cases abnormal superficial vessels were seen mainly in relation to th...

Eales' disease is an idiopathic obliterative retinal vasculopathy that is treated with laser photocoagulation, and/or vitrectomy. In order to determine visual outcomes and regression of retinal neovascularization following scattered peripheral retinal photocoagulation, and/or vitrectomy in cases with Eales' disease, we did a retrospective study of the records of these patients treated in La...

INTRODUCTION The aim of this study was to determine the effectiveness of intraocular injections of bevacizumab for neovascularisation of the iris and neovascular glaucoma. CLINICAL PICTURE Three patients with neovascularisation of the iris due to various causes were recruited. TREATMENT Patients were treated with intraocular bevacizumab. OUTCOME Neovascularisation of the iris was noted to...

We report a case of rubeosis iridis resulting from agenesis of the internal carotid artery. Agenesis of the internal carotid artery is a rare congenital anomaly, and most patients do remain asymptomatic, but we should realize that this condition may lead to ocular ischemic changes, the result being rubeosis iridis.

Hyphaema developed spontaneously in 16 of 458 patients with microbial keratitis treated at two centres on the East and West Coasts of the United States. Chronic corneal conditions were often present, and three cases had rubeosis iridis. Inflamed iris vessels were assumed to be the source of the haemorrhage. The hyphaemas tended to persist longer than is usual, particularly when coincident with ...