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...

A 39-year-old man with pathologic myopia and a dislocated native lens of the right eye underwent pars plana lensectomy and implantation of an iris-fixated 3-piece MA60MA foldable acrylic intraocular lens with -5.0 diopter power. The patient presented 11 months later with spontaneous haptic disinsertion from the optic. The meniscus (concave-convex) configuration of this iris-fixated lens may hav...

purpose : to determine the distribution of iris colors in the population of tehran and to assess possible associations between iris color and ocular disorder methods : through a stratified random cluster sampling approach, 160 clusters were selected in different municipality districts of tehran, and the approached households were invited to a clinic. after the initial interview, all participant...

A elderly male presented with painful loss of vision in the left eye for 20 days expulsion intra-ocular content following a blunt trauma. The best corrected visual acuity was counting fingers close to face (CF-CF). Slit lamp examination revealed ciliary tissue prolapse gaping incision scar along posterior synechia, iris pigments, vitreous Anterior chamber, cells and flare. Patients aphakic had ...

june 2013 CataraCt & refraCtive Surgery today 19 AlAn S. CrAndAll, Md I would plan on using iris hooks to keep the iris from interfering with phacoemulsification, so I would create two extra paracenteses. If the astigmatism were regular, I would implant a toric IOL. If the astigmatism were irregular, I would not address it initially. Given the amount of trauma to the eye, my primary concern wou...

The recently published paper by Rankin et al. [1] ‘‘Iris recognition failure over time: The effects of texture’’ is paradoxical because in fact no changes over time were demonstrated, either in the iris patterns or in the system performance. The authors measured iris recognition performance using ‘‘local and non-local dipole and tripole’’ methods of iris feature extraction proposed by Sun et al...

The objective of this report is to demonstrate the effectiveness of an iris prosthesis to treat a refractory glaucoma induced by silicone oil in the anterior chamber. This case is about a patient who suffered a trauma caused by firearm shrapnel. A vitreous-retinal surgery was performed to remove intraocular foreign matter and to realign the retina that was detached. Due to the partial traumatic...

The increased acceptance of topical anesthesia, phacoemulsification and foldable intraocular lenses (IOLs), have advanced the techniques of microincision clear corneal cataract surgery.1 Operating through these small (less than 3.0 mm), corneal incisions have placed new demands on surgeons to effectively and safely remove the cataract and implant the IOL without increasing the risk of corneal, ...