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)

From Soul to Self takes the reader on a fascinating journey through philosophy, theology, religious studies, and physiological sciences. Each of the essays, drawn from a number of different fields, focuses on the idea of the soul and of our sense of ourselves. A stellar line-up of authors explore the relationship between a variety of ideas that have arisen in philosophy, religion and science, each idea seeking to explain why we think that we as individuals are somehow distinct and unique. (...) Contributors: Richard Sorabji, Anthony Kenny, Kallistos Ware, Peter Riviere, Gary Matthews, Susan Greenfield, Galen Strawson. (shrink)

That Catullus’ sixty-fourth poem influenced Virgil's work has long been accepted. We approach a little nearer a resolution of the enigma of the Fourth Eclogue when we recognize epithalamian elements within it that echo not only the song of the Parcae, but also the themes of the Golden Age, of the Voyage of the Argo, and of the relations between gods and men from Catullus’ poem. Similarly, Ariadne's part in the creation of Aeneid 4, both in the ‘marriage’ scene and (...) in Dido's reproaches to Aeneas, has been noted. (shrink)

Keywords Religious poem - Metaphysical poem.

Festschrift honoring P.F. Strawson; includes contributed articles on his contributions in logic and on logic.

Pv~P: Cambridge Journal of Undergraduate Philosophy, Issue 1, 1982.

This is a well-behaved concept in Newtonian physics. But a center of gravity is not an atom or a subatomic particle or any other physical item in the world. It has no mass; it has no color; it has no physical properties at all, except for spatio-temporal location. It is a fine example of what Hans Reichenbach would call an abstractum. It is a purely abstract object. It is, if you like, a theorist's fiction. It is not one of the (...) real things in the universe in addition to the atoms. But it is a fiction that has nicely defined, well delineated and well behaved role within physics. (shrink)

This chapter contains sections titled: Life Themes Definite descriptions and reference Truth Logical theory Meaning and related notions Individuals Persons and states of mind Subjects and predicates The bounds of sense Responses to skepticism Freedom and resentment Conclusion.

This is a transcript of a conversation between P F Strawson and Gareth Evans in 1973, filmed for The Open University. Under the title 'Truth', Strawson and Evans discuss the question as to whether the distinction between genuinely fact-stating uses of language and other uses can be grounded on a theory of truth, especially a 'thin' notion of truth in the tradition of F P Ramsey.