Adrian Stokes , long admired by a small, highly distinguished, mostly English circle, was the natural successor to Pater and Ruskin. But though his place in cultural history is important, what is of particular interest now to art historians is his theory of the presentness of painting, a theory which offers a challenging critique of the practice of artwriting. From Vasari to the present, the most familiar rhetorical strategy of the art historian is the narrative of “the form, prophet-saviour-apostles,” in (...) which the first artist poses some problem that his successors develop and their successors solve.1 Such very different books as Art and Illusion and Art and Culture deploy that plan. The three periods of naturalism in E. H. Gombrich’s narrative—antiquity, Renaissance religious narrative, nineteenth-century landscape—function like Clement Greenberg’s sequence—old master art, early French modernism, American abstract expressionism. Gombrich and Greenberg disagree about how to narrate art’s history and about which works to include in that narrative—Gombrich asserts that cubism closes the canon while for Greenberg analytical cubism anticipates Jackson Pollock—but in each case, the art historian aims, as the novelist does, to tell a satisfying story and achieve narrative closure, and so how we think of the artworks the historian discusses depends in part upon the structure of the narrative. In a certain mood, we may find this fact intolerable. Why should a mere text tell us how to see the painting we may stand before?Stokes’ attempt to respond to this mood belongs to a tradition of early twentieth-century antihistorical thinking. For Rainer Maria Rilke, Rodin’s sculpture aimed to “refer to nothing that lay beyond it.” For Ezra Pound, an image “is real because we know it directly”; Henri Gaudier-Brzeska could read Chinese ideograms without knowing that language because those ideograms are transparently meaningful images. For Wyndham Lewis, a musical piece is inferior to a statue, “always there in its entirety before you.”2 Such an artwork need not be interpreted because it contains “within itself all that is relevant to itself.”3 All art is accessible to the gifted observer, and time is, in an interesting double sense, irrelevant. We see directly the meaning of works even from distant cultures; the visual artwork is experienced all at once, outside of time. If these claims are correct, what is the artwriter to do? Speaking of the Tempio Malatestiana, Hugh Kenner points to this issue:There is no description of the Tempio in accordance with good Vorticist logic: one art does not attempt what another can do better, and the meaning of the Tempio has been fully explicated on the spot by Agostino di Duccio with his chisel.4 1. Michael Baxandall, Giotto and the Orators: Humanist Observers of Painting in Italy and the Discovery of Pictorial Composition 1350-1450 , p. 75.2. Rainer Maria Rilke, Rodin, trans. Jessie Lemont and Hans Trausil , p. 19; Ezra Pound, Gaudier-Brzeska: A Memoir , p. 86; Wyndham Lewis, Time and Western Man , p. 174.3. Frank Kermode, Romantic Image , p. 107.4. Hugh Kenner, The Pound Era , p. 428. David Carrier, associate professor of philosophy at Carnegie-Mellon University, is coauthor, with Mark Roskill, of Truth and Falsehood in Visual Images and author of the forthcoming Artwriting, a study of recent American art criticism. He is working on a history of art history. (shrink)

Organizational leaders are eager to unlock the creative potential of followers. Yet, there is growing evidence that creativity can also have a dark side within organizations. Building on research linking creativity and unethical behavior, we develop the construct of creative unethicality—behavior that is both unethical and novel. We draw on social exchange theory to develop a model that identifies both why and when creative unethicality emerges within organizations. Specifically, we investigate the exchange dynamics through which creative support provided by empowering (...) leaders facilitates creative unethicality under conditions of high performance pressure. Across two multi-wave, multi-source field studies with employee-coworker and leader-subordinate dyads and an experimental study with a novel unethicality measure in a business simulation, we find convergent support for our theoretical model. These findings have important theoretical and practical implications for fostering creativity in organizations without simultaneously facilitating creative unethicality. (shrink)

People attribute purposes in both mundane and profound ways—such as when thinking about the purpose of a knife and the purpose of a life. In three studies (total N = 13,720 observations from N = 3,430 participants), we tested whether these seemingly very different forms of purpose attributions might actually involve the same cognitive processes. We examined the impacts of four factors on purpose attributions in six domains (artifacts, social institutions, animals, body parts, sacred objects, and human lives). Study 1 (...) manipulated what items in each domain were originally created for (original design) and how people currently use them (present practice). Study 2 manipulated whether items are good at achieving a goal (effectiveness) and whether the goal itself is good (morality). We found effects of each factor in every domain. However, whereas morality and effectiveness had remarkably similar effects across domains, the effects of original design and present practice differed substantially. Finally, Study 3 revealed that, within domains, the effects of original design and present practice depend on which entities design and use items. These results reveal striking similarities in purpose attributions across domains and suggest that certain entities are treated as authorities over the purposes of particular items. (shrink)

The frequency and severity of natural disasters and extreme weather events are increasing, taking a dramatic economic and relational toll on the communities they strike. Given the critical role that entrepreneurship plays in a community’s viability, it is necessary to understand how small business owners respond to these events and move forward over time. This study explores the long-term dynamics and trajectory of individuals within the broader business community following a natural disaster, paying particular attention to the influence of social (...) identity. Results suggest that the community identity changes over the course of recovery and rebuilding, underscoring the need for a holistic approach so that intervening agencies can achieve the sustainable economic recovery desired. (shrink)

When it first appeared in 1979, Philosophy and the Mirror of Nature hit the philosophical world like a bombshell. In it, Richard Rorty argued that, beginning in the seventeenth century, philosophers developed an unhealthy obsession with the notion of representation: comparing the mind to a mirror that reflects reality. Rorty's book is a powerful critique of this imagery and the tradition of thought that it spawned. Thirty years later, the book remains a must-read and stands as a classic of twentieth-century (...) philosophy. Its influence on the academy, both within philosophy and across a wide array of disciplines, continues unabated. This edition includes new essays by philosopher Michael Williams and literary scholar David Bromwich, as well as Rorty's previously unpublished essay "The Philosopher as Expert.". (shrink)

BackgroundObtaining consent has become a standard way of respecting the patient’s rights and autonomy in clinical research. Ethical guidelines recommend that the child’s parent/s or authorised legal guardian provides informed consent for their child’s participation. However, obtaining informed consent in paediatric research is challenging. Parents become vulnerable because of stress related to their child’s illness. Understanding the views held by guardians and researchers about the consent process in Malawi, where there are limitations in health care access and research literacy will (...) assist in developing appropriate consent guidelines.MethodsWe conducted 20 in-depth interviews with guardians of children and research staff who had participated in paediatric clinical trial and observational studies in acute and non-acute settings in the Southern Region of Malawi. Interviews were audio-recorded, transcribed verbatim, and thematically analysed. Interviews were compared across studies and settings to identify differences and similarities in participants’ views about informed consent processes. Data analysis was facilitated by NVIVO 11 software.ResultsAll participants across study types and settings reported that they associated participating in research with therapeutic benefits. Substantial differences were noted in the decision-making process across study settings. Guardians from acute studies felt that the role of their spouses was neglected during consenting, while staff reported that they had problems obtaining consent from guardians when their partners were not present. Across all study types and settings, research staff reported that they emphasised the benefits more than the risks of the study to participants, due to pressure to recruit. Participants from non-acute settings were more likely to recall information shared during the consent process than participants in the acute setting.ConclusionThe health care context, culture and research process influenced participants’ understanding of study information across study types and settings. We advise research managers or principal investigators to define minimum requirements that would not compromise the consent process and conduct study specific training for staff. The use of one size fits all consent process may not be ideal. More guidance is needed on how these differences can be incorporated during the consent process to improve understanding and delivery of consent.Trial registration Not applicable. (shrink)

This article makes a contribution to interface criticism through the notion of chrono-design: the deliberate shaping of experiences of temporality and time through contemporary software techniques and digital technologies. This notion is articulated through discussions of network optimisation, user experience design, behavioural tracking, Hansen’s work on 21st-century media and Hayles’ framework of cognitive assemblages. In particular, the argument considers how contemporary user interfaces complicate conventional notions of the rational, self-reflexive subject by operating beyond consciousness at vast environmental dimensions and accelerated (...) micro-temporal speeds. These conditions, we argue, provide opportunities for new forms of behavioural suspense and captivation best exemplified through the figure of the trap. The politics and aesthetics of captivation, accordingly, should be considered as central to any expanded ecology of cognition. The article then concludes with a short demonstration of experimental uses of chrono-design methods applied critically to political economies of user tracking and data capture as a prompt for further interdisciplinary applied research in this domain. (shrink)

If group norms and decisions foster peace, then understanding how norms and decisions arise becomes important. Here, we suggest that neither norms nor other forms of group-based decision making (such as offering restitution) can be adequately understood without simultaneously considering (i) what individual psychologies are doing and (ii) the dynamics these psychologies produce when interacting with each other.

The High Line – a public park on a repurposed railway track in New York City – first opened to the public in 2009, and has been increasingly celebrated as a model public space, and as a democratic project directed by community. Artistic and amateur photographic practices have significantly informed the High Line’s design, landscaping, publicity, urban policy, use and constellations of community. This photo-conceptual essay critically considers the constitutive function of the photographic image, as photography produces, interpellates and defines (...) the public and public sphere of the High Line. However, these imaging practices have also taken increasingly regulated form, and endorse conservative forms of community, personhood and publicness. The new park’s imaging practices may be understood as supplementary to neoliberal forms of property accumulation, in fact diminishing public space even as they purport to represent it. Drawing from the historical avant-garde, feminist critiques of representation and anti-capitalist urban theory, the following photographic series critiques the High Line’s photographic apparatus, from within a practice of photography, and from a position within the field of contemporary art. (shrink)

Cyber technology gives states the ability to accomplish effects that once required kinetic action. These effects can now be achieved with cyber means in a manner that is covert, deniable, cheap, and technologically feasible for many governments. In some cases, cyber means are morally preferable to conventional military operations, but in other cases, cyber's unique qualities can lead to greater mischief than governments would have chanced using kinetic means. This volume addresses the applicability of traditional military ethics to cyber operations, (...) jus ad vim, the rights of the targets of cyber operations, cyber sabotage, cyber surveillance, phase zero operations, psychological operations, artificial intelligence, and algorithmic ethics. Uniquely, it includes a number of cyber incidents that do not currently exist as case studies and have not received much public attention. This volume has been designed to work as a handbook for military and security professionals involved in cyber training, teaching, and application. (shrink)

A literature in which most data are outliers is flawed, and the target article sounds a timely alarm call for the behavioural sciences. It also suggests remedies. We mostly concur, except for arguing that the importance of the fact that the researchers themselves are mostly outliers has been underplayed. Improving matters requires non-Western researchers, as well as research subjects.

As the functional capabilities of high-tech medical products converge, supplying organizations seek new opportunities to differentiate their offerings. Embracing product sustainability-related differentiators provides just such an opportunity. This study examines the challenge organizations face when attempting to understand how customers perceive environmental and social dimensions of sustainability by exploring and defining both dimensions on the basis of a review of extant literature and focus group research with a leading supplier of magnetic resonance imaging (MRI) scanning equipment. The study encompasses seven (...) hospitals and one private imaging center in the Netherlands and identifies five social aspects that cover 11 indicators. The authors conduct 22 customer perception interviews with key decision-making stakeholders involved in purchasing MRI scanning equipment. Respondents find environmental and social sustainability dimensions personally relevant but professionally secondary to cost, performance, and ability to use the equipment in their organizations' physical infrastructure. Finally, incorporating a product's environmental and social credentials within the marketing of MRI scanning equipment enhances the perception of the product offering in decisionmaking stakeholders' minds and provides a means of differentiation. (shrink)

For a writing to be a writing it must continue to "act" and to be readable even when what is called the author of the writing no longer answers for what he has written, for what he seems to have signed, be it because of a temporary absence, because he is dead or, more generally, because he has not employed his absolutely actual and present intention or attention, the plenitude of his desire to say what he means, in order to (...) sustain what seems to be written "in his name" (Derrida 1988, p. 8). Ein Buch ist ein spiegel; wenn ein Affe hineinguckt, so kann freilich kein Apostel heraussehen (A book is a mirror; if an ape peers into it an apostle will never peer out.) (Lichtenberg 1949, p. 297). (shrink)

This collection emphasizes a cross-disciplinary approach to the problem of scale, with essays ranging in subject matter from literature to film, architecture, the plastic arts, philosophy, and scientific and political writing. Its contributors consider a variety of issues provoked by the sudden and pressing shifts in scale brought on by globalization and the era of the Anthropocene, including: the difficulties of defining the concept of scale; the challenges that shifts in scale pose to knowledge formation; the role of scale in (...) mediating individual subjectivity and agency; the barriers to understanding objects existing in scalar realms different from our own; the role of scale in mediating the relationship between humans and the environment; and the nature of power, authority, and democracy at different social scales. (shrink)

In much of the developing world daughters receive lower education and other investments than do their brothers, and may even be so devalued as to suffer differential mortality. Daughter disadvantage may be due in part to social norms that prescribe that daughters move away from their natal family upon marriage, a practice known as virilocality. We evaluate the effects of virilocality on female disadvantage using data from the Indonesia Family Life Survey. We find little support for the hypothesis. There is (...) no evidence that the overall pattern of rough equality in the treatment of boys and girls in Indonesia masks differences according to post-marital residential practice. Virilocal groups do not have "missing daughters." Nor is there other evidence of son preference, such as in relatively low height-for-age or education for girls and women in virilocal areas. Explanations of daughter disadvantage as due to virilocality should be subject to further scrutiny and contextualization. (shrink)

Die gegenwartigen Herausforderungen des internationalen Verhaltnisses sind Gemeingut: Gewalt zwischen und in Staaten, Bedrohung durch Massenvernichtungswaffen, der zunehmende globale Wirtschaftsverkehr. Durch sie ist souverane Staatlichkeit als Kern politischer Handlungsoptionen, rechtlicher Begriffsbildung und ihrer wissenschaftlichen Erfassung problematisch geworden. Oft erscheint der Ruckzug auf staatliche Selbstbehauptung oder die Einrichtung einer globalen Zwangsgewalt als einzige Losung. Welches Potential im Gegensatz dazu in dem auf Kant zuruckgehenden Gedanken internationaler Kooperation liegt, untersuchten Vertreter verschiedener Fachrichtungen im Rahmen der im Band dokumentierten interdisziplinaren Tagung des Seminars (...) fur Rechtsphilosophie an der Universitat Hamburg.". (shrink)

Frank Mathias Oppenheim was born in Coldwater, Ohio, on May 18, 1925, and studied at Xavier, Loyola, and Saint Louis Universities. He joined the Chicago Province of the Jesuit Order in 1942 and was ordained on June 15, 1955. He is the author of four books on Josiah Royce’s philosophy: Royce’s Journey Down Under, Royce’s Mature Philosophy of Religion, Royce’s Mature Ethics, and Reverence for the Relations of Life: Re-Imagining Pragmatism via Josiah Royce’s Interactions with Peirce, James, and Dewey, in (...) addition to scores of journal articles devoted to Royce. Oppenheim is also the editor of Josiah Royce’s Late Writings: A Collection of Unpublished and Scattered Works, and was... (shrink)

Negative people/wildlife interaction has raised public interest in wildlife population control. We present a contingent valuation study of alternative deer control measures considered for Hilton Head Island, SC. Lethal control usig sharpshooters and nonlethal immuno-contraception techniques are evaluated. A mail-back survey was used to collect resident willingness-to-pay information for reduced deer densities and consequent property damage. Residents are unwilling to spend more for the nonlethal alternative. The estimated WTP appears theoretically consistent as increasing levels of abatement for both lethal and (...) nonlethal alternatives demonstrate diminishing marginal benefits. Over 60% of respondents bid zero regardless of control measure, suggesting a referendum would fail. However, only half of these zero bidders expressed no problem with deer, while the other half bid zero because of distaste for the control alternative, safety concerns, or doubt about effectiveness. Inclusion of these responses as legitimate zero bids depressed mean WTP estimates from 22 to 31%. (shrink)

We examine one of the well-known mathematical works of Abraham bar Ḥiyya: Ḥibbur ha-Meshiḥah ve-ha-Tishboret, written between 1116 and 1145, which is one of the first extant mathematical manuscripts in Hebrew. In the secondary literature about this work, two main theses have been presented: the first is that one Urtext exists; the second is that two recensions were written—a shorter, more practical one, and a longer, more scientific one. Critically comparing the eight known copies of the Ḥibbur, we show that (...) contrary to these two theses, one should adopt a fluid model of textual transmission for the various manuscripts of the Ḥibbur, because neither of these two theses can account fully for the changes among the various manuscripts. We hence offer to concentrate on the typology of the variations among the various manuscripts, dealing with macro-changes (such as omissions or additions of proofs, additional appendices or a reorganization of the text itself), and micro-changes (such as textual and pictorial variants). (shrink)

There is considerable uncertainty about the implications of the new genetics for health services. These are the enthusiasts who argue that molecular genetics will transform health care and others argue that the scope for genetic interventions is limited. The aim of this paper is to examine some of the questions, tensions and difficulties which face health care providers particularly in developed countries as they try to come to terms with the dilemmas raised by new genetic health care technologies (NGHTs). It (...) identifies questions for research which may help the development of robust and flexible strategies for implementation. (shrink)

Three leading philosopher-logicians present a clear and concise overview of formal theories of truth, explaining key logical techniques. Truth is as central topic in philosophy: formal theories study the connections between truth and logic, including the intriguing challenges presented by paradoxes like the Liar.

Most writers now recognize that mental health policy and the mental health system are extremely resistant to real changes that reflect genuine biopsychosocial paradigms of mental disorder. Writers bemoaning the intransigence of the mental health system tend to focus on a small analytical level, only to find themselves mired in the rationalities of the existing system. Problems are acknowledged to be system-wide, yet few writers have used a method of analysis appropriate for systemic problems. Drawing upon the General System Theory (...) (GST) analytical perspective, this article advances a systematic approach to understand the mental health system and to facilitate the development of reform strategies that recognize the system's complexity and changing nature. The article first discusses the failure of major reform efforts in the mental health system and the limitations of mainstream analysis of mental health politics and policies with respect to the objectives of analysis and reform. This article describes how systems thinking has thus far influenced the study of the mental health policy and politics system, and argues that a systemic perspective is profitable for reconceiving the mental health system, enabling a fresh basis for the development of reform strategies. The mental health system should be seen as a social system influenced by larger political and economic dimensions, not just as a 'delivery system' scientifically constructed by neutral experts. Furthermore, the policy planning process should be viewed as part and parcel of a mental health system modeled as complex and dynamic. The systemic perspective outlined here should help both to clarify the value-based objectives that we hold for the system and, consequently, to plan for the strategic reforms that have so far eluded us. (shrink)

When is it right to go to war? The most persuasive answer to this question has always been 'in self-defense'. In a penetrating new analysis, bringing together moral philosophy, political science, and law, David Rodin shows what's wrong with this answer. He proposes a comprehensive new theory of the right of self-defense which resolves many of the perplexing questions that have dogged both jurists and moral philosophers. By applying the theory of self-defense to international relations, Rodin produces (...) a far-reaching critique of the canonical Just War theory. The simple analogy between self-defense and national defense - between the individual and the state - needs to be fundamentally rethought, and with it many of the basic elements of international law and the ethics of international relations. (shrink)

This article argues that some reviewers contribute more to research than many authors, and suggests that reviewers meet the ICMJE criteria for authorship in many cases.

Opinion about neonatal male circumcision is deeply divided. Some take it to be a prophylactic measure with unequivocal and significant health benefits, while others consider it a form of child abuse. We argue against both these polar views. In doing so, we discuss whether circumcision constitutes bodily mutilation, whether the absence of the child's informed consent makes it wrong, the nature and strength of the evidence regarding medical harms and benefits, and what moral weight cultural considerations have. We conclude that (...) nontherapeutic circumcision of infant boys is a suitable matter for parental discretion. (shrink)

Martin Heidegger is, perhaps, the most controversial philosopher of the twentieth-century. Little has been written on him or about his work and its significance for educational thought. This unique collection by a group of international scholars reexamines Heidegger's work and its legacy for educational thought.

We applaud Aggleton & Brown's affirmation of limbic diencephalic-hippocampal interaction as a key memory substrate. However, we do not agree with a thesis of diencephalic-hippocampal strict dedication to episodic memory. Instead, this circuitry supports the production of context-specific patterns of activation that subserve retrieval for a broad class of memory phenomena, including goal-directed instrumental behavior of animals and episodic memory of humans.

This is an obituary for Michael H. Robins.

In this article we propose a framework for description and analysis of public life by treating “outings” as a unit of sociological analysis. Studying outings requires bracketing a concern with bounded places and isolated encounters. Instead, descriptions of outings track people as they organize trips “out,” including their preparations, turning points, and post hoc reflections. We emphasize how people understand and contextualize their time in public by linking situated moments of public life to the outing’s unfolding trajectory and to people’s (...) biographical circumstances. We treat outings in and through public parks as a strategic site to show the utility of studying public outings more generally. A sociology of outings has broad theoretical and methodological implications for how we understand the collective patterning of public life and inequality in everyday encounters. (shrink)

The connection between quantum mechanics and classical statistical mechanics has motivated in the past the representation of the Schrödinger quantum-wave equation in terms of “projections” onto the quantum configuration space of suitable phase-space asymptotic kinetic models. This feature has suggested the search of a possible exact super-dimensional classical dynamical system, denoted as Schrödinger CDS, which uniquely determines the time-evolution of the underlying quantum state describing a set of N like and mutually interacting quantum particles. In this paper the realization of (...) the same CDS in terms of a coupled set of Hamiltonian systems is established. These are respectively associated with a quantum-hydrodynamic CDS advancing in time the quantum fluid velocity and a further one the RD-CDS, describing the relative dynamics with respect to the quantum fluid. (shrink)

Much recent discussion surrounding valuation of the arts and culture, particularly in the policy arena, has been dominated by a concern to identify an economic and financial basis for valuation of art works, arts, activities and more general ways in which we express our culture. Whereas a great deal can be gained from a fuller understanding of the economic value of art, there is a real danger that financial considerations will tend to crowd out all other aspects of value. This (...) book moves beyond the limitations implicit in a narrow economic approach, bringing different disciplinary viewpoints together, opening up a dialogue between scholars about the processes of valuation that they use and exploring differences and identifying common ground between the various viewpoints. The book's common theme – the tension between economic and cultural modes of evaluation – unites the chapters, making it a coherent and unified volume that provides a new and unique perspective on how we value art. (shrink)

Karl Marx ist zweifellos einer der einflussreichsten deutschen Philosophen, zudem Theoretiker der Geschichte, der Ökonomie, der Anthropologie etc. Seine Aktualität ist zumal in Zeiten der Finanzkrise ungebrochen. Nach einem Überblick über die Biographie stellt dieses Handbuch Marx Werke in ihren Hauptthesen vor. Ein umfangreiches Kapitel zu den Begriffen und Kontexten arbeitet die Relevanz des Marxschen Denkens für neuere Theoriediskussionen kritisch heraus. Grundlage auch heutiger Debatten sind z.B. seine Diagnosen zu Verdinglichung und Entfremdung, zu Arbeitswelt und Arbeitsformen (Fließbandarbeit), zum Umgang mit (...) natürlichen Ressourcen (Nachhaltigkeit), zu sozialer Gerechtigkeit (neues Prekariat), zu Weltwirtschaft und Imperialismus (Globalisierung) sowie zu den Paradoxien der finanzmarktwirtschaftlichen Weltwirtschaft. Der Schlussteil verfolgt die Rezeption Marx in verschiedenen Disziplinen von der Philosophie über die Theologie bis zur Ökonomie und wirft zudem einen Blick auf die politische Rezeption der Marx schen Schriften in China, der UdSSR und der DDR. Verkaufsargumente - Marx ist einer der einflussreichsten deutschen Philosophen. - Marx hat heute eine gewaltige Aktualität in Presse, Buchmarkt und Universität. - Das konkurrenzlose Handbuch bietet eine umfassende Darstellung von Leben, Werk und Wirkung. - Die öffentliche Aufmerksamkeit für Marx Werk nimmt stetig zu. - Die Autorinnen und Autoren des Handbuchs vertreten nicht eine Schule in der Marxforschung, sondern bieten einen ausgewogenen Überblick über Marx Werk und dessen Wirkung.k auf die politische Rezeption der Marx schen Schriften in China, der UdSSR und der DDR. Verkaufsargumente - Marx ist einer der einflussreichsten deutschen Philosophen. - Marx hat heute eine gewaltige Aktualität in Presse, Buchmarkt und Universität. - Das konkurrenzlose Handbuch bietet eine umfassende Darstellung von Leben, Werk und Wirkung. - Die öffentliche Aufmerksamkeit für Marx Werk nimmt stetig zu. - Die Autorinnen und Autoren des Handbuchs vertreten nicht eine Schule in der Marxforschung, sondern bieten einen ausgewogenen Überblick über Marx Werk und dessen Wirkung. (shrink)

PurposeTo evaluate the relationship between intraocular straylight perception and: (i) contrast sensitivity (CS), (ii) halo size, and (iii) hazard recognition distance, in the presence and absence of glare.Subjects and methodsParticipants were 15 (5 female) ophthalmologically healthy adults, aged 54.6–80.6 (median: 67.2) years. Intraocular straylight (log s) was measured using a straylight meter (C-Quant; Oculus GmbH, Wetzlar, Germany). CS with glare was measured clinically using the Optovist I device (Vistec Inc., Olching, Germany) and also within a driving simulator using Landolt Cs. (...) These were presented under both static or dynamic viewing conditions, and either with or without glare. Hazard detection distance was measured for simulated obstacles of varying contrast. For this, the participant was required to maintain a speed of 60 km/h within a custom-built nighttime driving simulator. Glare was simulated by LED arrays, moved by cable robots to mimic an oncoming car’s headlights. Halo size (“halometry”) was measured by moving Landolt Cs outward originating from the center of a static glare source. The outcome measure from “halometry” was the radius of the halo (angular extent, in degrees visual angle).ResultsThe correlation between intraocular straylight perception, log s, and hazard recognition distance under glare was poor for the low contrast obstacles (leading/subdominant eye: r = 0.27/r = 0.34). Conversely, log CS measured with glare strongly predicted hazard recognition distances under glare. This was true both when log CS was measured using a clinical device (Optovist I: r = 0.93) and within the driving simulator, under static (r = 0.69) and dynamic (r = 0.61) conditions, and also with “halometry” (r = 0.70). Glare reduced log CS and hazard recognition distance for almost all visual function parameters.ConclusionIntraocular straylight was a poor predictor of visual function and driving performance within this experiment. Conversely, CS was a strong predictor of both hazard recognition and halo extent. The presence of glare and motion lead to a degradation of CS in a driving simulator. Future studies are necessary to evaluate the effectiveness of all above-mentioned vision-related parameters for predicting fitness to drive under real-life conditions. (shrink)