PURPOSE To report the distribution of iris conicity (steepness of the iris cone), investigate associated factors, and test whether pseudophakia allows the iris to sink back. METHODS A population-based cross-sectional study was carried out. Ophthalmological examination including objective refraction, biometry, noncontact tonometry, and Scheimpflug imaging (Pentacam®, Oculus) was performed incl...

Regulation of epithelial cell proliferation, migration and differentiation under physiological conditions remains poorly understood. Interaction of the cells with their underlying basement membrane through integrins, a specific subset of cell surface binding proteins, is one potential mechanism. In the present work, I examined this hypothesis by investigating the distribution of a variety of ep...

BACKGROUND Tuberculosis-associated immune reconstitution inflammatory syndrome (TB-IRIS) is a substantial problem in HIV/TB coinfected patients commencing antiretroviral therapy (ART). The immunopathogenesis of TB-IRIS includes increased production of proinflammatory chemokines and cytokines, including interleukin-18, which is a signature cytokine of the nucleotide-binding domain and leucine-ri...

In this paper, efficient biometric security techniques for iris recognition system with high performance and high confidence are described. The system is based on an empirical analysis of the iris image and it is split in several steps using local image properties. The system steps are capturing iris patterns; determine the location of the iris boundaries; converting the iris boundary to the st...

To find a fast, effective iris template aimed at speeding up the iris localization, normalization and feature extraction process and increasing their precision. Iris localization is the main part of any iris recognition system as the success of any Biometrics system depends on the accurate and effective i.e. less timeconsuming localization method. Further, iris detection is a computationally in...

purpose: to report two cases of secondary epithelial iris cyst (seic) with pus-like precepitates in the cyst. patients and findings: two young men with history of penetrating trauma to the eye and primary repair developed secondary epithelial iris cyst several years later. slit-lamp biomicroscopy revealed a large cyst originating from the site of the laceration. the cyst was filled with pus-lik...

— This paper analyses the set of iris codes stored or used in an iris recognition system as an f-granular space. The f-granulation is given by identifying in the iris code space the extensions of the fuzzy concepts wolves, goats, lambs and sheep (previously introduced by Doddington as 'animals' of the biometric menagerie) – which together form a partitioning of the iris code space. The main que...

This paper discuss the latest trends in the field of evolutionary approaches to iris recognition, approaches which are compatible with the task of multi-enrollment in a biometric authentication system based on iris recognition, and which are also able to ensure strong discrimination between the enrolled users. A new authentication system based on supervised learning of iris biometric identities...

This paper presents an efficient algorithm for iris recognition using phase-based image matching—an image matching technique using phase components in 2D Discrete Fourier Transforms (DFTs) of given images. Experimental evaluation using the CASIA iris image databases (versions 1.0 and 2.0) and Iris Challenge Evaluation (ICE) 2005 database clearly demonstrates that the use of phase components of ...

This paper proposes a person identification system (PID), which works with non-illumination low-resolution eye images. Radial-Scan and threshold methods are used for Iris normalization and Iris segmentation from the eye image respectively. Conventional neural network is used for iris matching. The proposed algorithm works with 96 features of the iris. Space complexity is less and Iris codes are...