Peripheral vision

Humans’ conscious awareness of objects in their visual periphery is limited. This limit is not entirely the result of reduced visual acuity. Rather, it is primarily caused by crowding—the difficulty identifying an object when it is surrounded by clutter. The effect of crowding on visual awareness in infants has yet to be explored. Do infants, for example, have a fine-grained “spotlight,” as adults do, or do infants have a diffuse “lantern” that sets limits on what they can register in their visual periphery? We designed an eye-tracking paradigm to psychophysically measure crowding in infants between 6 months and 15 months of age. We showed infants pairs of faces at three eccentricities, in the presence or absence of flankers, and recorded infants’ first saccade from central fixation to either face. Infants could discriminate faces in the periphery, and flankers impaired this ability. We found that the effective spatial resolution of infants’ visual perception increased with age, but...

A previous study indicated that peripheral visual information strongly affects the judgment of egocentric distances for users of immersive virtual environments. The experiment described in this document aimed to investigate if these effects could be explained in terms of changes in gait caused by visual information in the extreme periphery. Three conditions with varying degrees of peripheral occlusion were tested and participants' walking characteristics measured. The results indicate that the improvements in distance ...

"Concerning the design of contemporary public open urban spaces, much debate has taken place since modernism, on the evaluation of the levels of perceptual security scrutinized upon
since the time of Camillo Sitte, who studied concepts of enclosure, groupings, open and closed structures, and irregularity of peripheral vision as means of perceptual security and pleasure. The problem becomes more complicated with the more synthetic and hybrid characteristics of modern city development, where enclosure, irregularity and proportion come in contrast with values of openness, minimalism, and cubist interpretations of design solutions. The following paper is an analysis aimed at providing a more in-depth understanding of the psychology of perception within a space, through the investigation of interpersonal functions and their relationships to the visitors, through evaluation of bound spaces (where someone may feel either comfortable, safe and protected, or restricted and smothered) and unbound spaces, (where someone may feel either free or vulnerable
and exposed). The end result is a syntactic coherence including elements of structure, theme, information availability, framing,  articulation, and path."

Humanity is on the threshold of recognizing the fundamental error in its view of life and death. Both death as well as active life is necessary to the vital formation of a larger, more essential whole. In this paper, I apply the sociology of knowledge and change as it pertains to death and focus on ways in which we can step outside its traditional frameworks and limitations. I also discuss topics related to death such as birth, aging, sickness, and war, and examine cultural differences in attitudes toward death. I offer varying perspectives including the Buddhist view and from these draw implications and conclusions. I apply the lenses of contemporary social scientists such as Edgar Morin, Kenneth Gergen, Edward Stewart, Milton Bennett, Mary Catherine Bateson, E. Doyle McCarthy, Philip Slater, and Piotr Sztompka. To these I add other relevant passages from the writings and speeches of key thinkers on the topic of death, in particular, Buddhist philosopher, peacebuilder, and educator, Daisaku Ikeda. To construct a more humanistic and sustainable view of life, it is first of all crucial to establish a culture which perceives death in its larger living context as but one cycle in the expansive eternity of life.

The monovision concept of correcting one eye for distance and the other for near maybe utilized in presbyopes undergoing refractive surgery. We have performed a systematic review of published literature to evaluate the factors influencing monovision success, and to determine the visual outcome in patients with monovision. Articles in MEDLINE and published bibliographies reporting monovision prescription for correction of presbyopia were systematically identified and reviewed. Pertinent data were abstracted and, when feasible, statistically analyzed. The mean success rate was 73%. The success in monovision correlated with distance correction on dominant eye, alternating dominance, less than 50 seconds of arc stereoacuity reduction, and less than 0.6 prism diopter of distance esophoric shifts. Monovision resulted in significant reduction of binocular contrast sensitivity function at spatial frequencies higher than 4 cycles per degree, and 2–6% reduction in task performance, but resulted in minimal reduction of binocular visual acuity, peripheral vision, visual field width and binocular depth of focus. The published literature indicates that monovision is an effective and reasonable therapeutic modality for correcting presbyopia. Proper patient selection and clinical screening are essential for monovision success.

We examined the limits of visual resolution in natural scene viewing, using a gaze-contingent multiresolutional display having a gaze-centred area-of-interest and decreasing resolution with eccentricity. Twelve participants viewed high-resolution scenes in which gaze-contingent multiresolutional versions occasionally appeared for single fixations. Both detection of image degradation (five filtering levels plus a no-area-of-interest control) in the gaze-contingent multiresolutional display, and eye fixation durations, were well predicted by a model of eccentricity-dependent contrast sensitivity. The results also illuminate the time course of detecting image filtering. Detection did not occur for fixations below 100 ms, and reached asymptote for fixations above 200 ms. Detectable filtering lengthened fixation durations by 160 ms, and interference from an imminent manual response occurred by 400-450 ms, often lengthening the next fixation. We provide an estimate of the limits of visual resolution in natural scene viewing useful for theories of scene perception, and help bridge the literature on spatial vision and eye movement control.

Visual perception is important for the futsal player to practice the actions of the match with good skill. The peripheral vision is important for the attack, because the sportsman has more chances of goals. The objective of the study was to determine the effect of the peripheral vision training of futsal goal zone. Ten young futsal players, with an average

To determine how severe peripheral field loss (PFL) affects the dispersion of eye movements relative to the head in patients walking in real environments. This information should help to define the visual field and clearance requirements for head-mounted mobility visual aids. Eye positions relative to the head were recorded in five patients with retinitis pigmentosa who had less than 15 degrees of visual field and in three normally sighted people, each walking in varied environments for more than 30 minutes. The eye-position recorder was made portable by modifying a head-mounted system (ISCAN, Burlington, MA). Custom data processing was implemented, to reject unreliable data. Sample standard deviations of eye position (dispersion) were compared across subject groups and environments. The patients with PFL exhibited narrower horizontal eye-position dispersions than did the normally sighted subjects (9.4 degrees vs. 14.2 degrees , P < 0.0001), and the vertical dispersions of patien...

This study was conducted to discuss the unsuccessful experience of Starbucks in Israel and to show that it was primarily a result of lack of peripheral vision in addition to other factors, including a weak management performance. Relevant information published in Israel and abroad were gathered using the concept of peripheral vision, supported by other concepts, to analyze and offer insight into this case study. Starbucks in Israel made major mistakes, mainly in reading the map of the local coffee shop business and taking for granted success in the Israeli market. There was lack of up-to-date information on the local coffee shop business, and the relevant senior members were reluctant of being interviewed. This study can make a contribution to global corporations considering entering of Starbucks into the Israeli dynamic and competitive business arena. This is the first work in Israel and worldwide on the failure of Starbucks to penetrate Israel.

The human visual system is able to effortlessly integrate local features to form our rich perception of patterns, despite the fact that visual information is discretely sampled by the retina and cortex. By using a novel perturbation technique, we show that the mechanisms by which features are integrated into coherent percepts are scale-invariant and nonlinear (phase and contrast polarity independent).

We consider recent developments in the cultural industries in Turkey, with particular reference to television broadcasting. We seek to show how recent transformations in the industry have been associated with significant developments in Turkish cultural identity. Historically, broadcasting has existed under the monopoly of the state-run Turkish Radio and Television Authority (TRT), and functioned very much as a voice of the Kemalist ideology of the Republic. From 1990, however, there was a rapid proliferation of illegal, commercial television channels, broadcasting signals from outside the country. This led to a new vitality in Turkish television culture, as the new commercial interests sought to develop programming that would appeal to audiences tired of the ‘official’ fare of TRT. Television began to reflect the popular culture of Turkey in ways that were quite creative. Since 1994, and the passing of new broadcasting legislation, the turbulence of commercialisation has quietened....