The security has become a major issue of concern among the people. Biometrics is automated method of identifying a person based on physiological or behavioural characteristics. Threat starts when an unwanted person tries to obtain access. A person authentication system localizes facial landmarks and extracts biometrical features for face authentication. This includes image acquisition, segmenta...

Iris detection and tracking plays a vital role in human–computer interaction has become an emerging field for researchers the last two decades. Typical applications such as virtual reality, augmented gaze customer behavior, controlling computers, handheld embedded devices need accurate precise of iris landmarks. A significant improvement been made so far tracking. However, landmarks real-time w...

Background: A number of ocular biometric parameters, iris hiotologic and anatomic characters have been suggested as inciting factors for converting patients with narrow angle to angle-closure glaucoma. This study was conducted to determine if there was any goniscopic difference between patients with acute angle-closure glaucoma (AACG) and chronic angle-closure glaucoma (CACG). Methods: ...

This paper presents an investigation of energy demands during localization of wireless nodes in ad-hoc networks. We focus on the method based on the received signal strength (RSS) to estimate the distances between the nodes. To deal with the uncertainty of this technique, statistical methods are used. It implies more measurement samples to be taken and consequently more energy to be spent. Ther...

PURPOSE To investigate the dynamics and distribution of toll-like receptor 4 (TLR4)-positive cells and resident tissue macrophages in the uvea during endotoxin-induced uveitis (EIU) in Wistar rats. METHODS Wistar rats (n=40) received a footpad injection of 200 microg of Vibrio cholera lipopolysaccharide (LPS), and the intensity of anterior segment inflammation was evaluated after the LPS inje...

PURPOSE To investigate the dynamics of resident and infiltrating immune cells in the choroid and iris during the early and late stages of experimental autoimmune uveitis (EAU) in Lewis rats. METHODS Uveoretinitis was induced by footpad injection of crude retinal extract and complete Freund's adjuvant with concurrent intraperitoneal injection of Bordetella pertussis. Five experimental (EAU) an...

PURPOSE To investigate the expression of lymphatic endothelial cell (LEC) markers in tissues of the anterior eye segment. METHODS Sections of human anterior segments from eight eyes of eight donors (37-100 years) were stained for Vegf-R3, Prox-1, Lyve-1, Pdpn, Pcx, CCR7, Ccl19, Ccl21, and CD68. Pdpn localization was additionally analyzed by immunogold labeling on sections of five eyes. Expres...

Studies were performed to determine the distribution of hematoporphyrin derivative (HPD) in ocular structures and to characterize long-term damage associated with ocular HPD photodynamic therapy. Pigmented rabbits with an amelanotic melanoma heterotransplanted to the iris were used to obtain quantitative tissue levels of HPD as well as to document HPD localization by fluorescence microscopy. HP...

The rabbit iris-ciliary body contains 78 & 8 ng/gm serotonin (5-HT) while the amine content in the aqueous humor is less than 0.01 ng/lOO pl. The low levels of endogenous 5-HT in the iris-ciliary body could not be directly detected by immunocytochemistry. However, pretreatment in viwo and in vitro with L-tryptophan and pargyline resulted in the localization of a sparse population of 5-HT fibers...