Videooculography (VOG) is an eye movement measurement method used in the objective evaluation of vestibulo-ocular reflexes (VOR). An important requirement of VOG is to accurately estimate pupil center and ocular torsion, irrespective of drooping eyelids, eyelashes, corneal reflection, and blinking. Finding the accurate center of the pupil is particularly important in three-dimensional VOG, sinc...

Iris recognition is considered to be the most reliable and accurate biometric identification system available. Iris recognition system captures an image of an individual’s eye, the iris in the image is then meant for the further segmentation and normalization for extracting its feature. The performance of iris recognition systems depends on the process of segmentation. Segmentation is used for ...

A modification of iris recognition algorithm using Hermite transform to find iris key points has been developed. The iris image mask for the areas free of eyelids, eyelashes and glares is constructed. The key points are found inside the masked iris region. The use of eye rotation compensation based on Polar Hermite Transform before iris parameterization makes the method more effective. The prop...

Iris recognition is regarded as the most reliable and accurate biometric identification system. Most commercial iris recognition systems use patented algorithms developed by Daugman and these algorithms are able to produce perfect recognition rates. These algorithms are based on linear search methods which make the identification process extremely slow and also raise the false acceptance rate b...

Iris pattern is the most reliable biometric in terms of recognition and identification performance. Nowadays iris recognition base on video is growing rapidly. In order to obtain a robust identification system, it requires a fast and accurate iris segmentation method to improve the recognition rate. In this paper we perform four optimizations to automates our previous segmentation method and re...

UPPER EYELIDS When considering rejuvenating the upper eyelids, it must be understood that with age, the eyebrow (Table 1) gravitates downward, causing a pseudodermachalasis of the upper eyelids. This, in turn, is responsible for static crow’s feet, and with a receding hairline we get widening of the forehead. Because the eyebrow is low, it is raised to improve the appearance (in front of the mi...

Rothmund-Thomson syndrome (RTS) is a rare dermatosis with about 300 cases reported to date. The authors describe two siblings with RTS and inflammatory conjunctival disease featuring fornix shortening and symblepharon as well as palpebral disease with sparse eyelashes. These cases demonstrate RTS ocular surface findings different to those usually described.

Case IV.?S. B. ,admitted with trichiasis. Right eyelids very much thickened, and their margins covered with short bristly hairs. Some of the latter must have been for some time in contact with the cornea, for superficial corneitis and consider* able pannus were present, and vision much impaired in consequence. This condition existed in both eyes, but not so fa* advanced in the left. Operation f...

Determining the pupil center is fundamental for calculating eye orientation in video-based systems. Existing techniques are error prone and not robust because eyelids, eyelashes, corneal reflections or shadows in many instances occlude the pupil. We have developed a new algorithm which utilizes curvature characteristics of the pupil boundary to eliminate these artifacts. Pupil center is compute...

PURPOSE Embryonic eyelid closure is a well-documented morphogenetic episode in mammalian eye development. Detection of eyelid closure defect in humans is a major challenge because eyelid closure and reopen occur entirely in utero. As a consequence, congenital eye defects that are associated with failure of embryonic eyelid closure remain unknown. To fill the gap, we developed a mouse model of d...