Pupil size is modulated by the size of equal-luminance gratings
نویسندگان
چکیده
منابع مشابه
Afterimage size is modulated by size-contrast illusions.
Traditionally, the perceived size of negative afterimages has been examined in relation to E. Emmert's law (1881), a size-distance equation that states that changes in perceived size of an afterimage are a function of the distance of the surface on which it is projected. Here, we present evidence that the size of an afterimage is also modulated by its surrounding context. We employed a new vers...
متن کاملMotion transparency from opposing luminance modulated and contrast modulated gratings
Two luminance gratings of identical orientation and opposite directions of motion are seen as moving across one another (i.e. moving transparently) only if they differ in spatial frequency (SF) by a factor of four or more. Identical SF gratings produce counter-phase flicker. This suggests that opposite motions cancel each other at the level of motion detection. Here we show that motion transpar...
متن کاملThe size and shape of the pupil in lightly anaesthetized cats as a function of luminance.
The S-shaped relation between pupil area and illumination is similar in this preparation to that of the human, with a mid-point just below 1 cd/m*. The range of pupii areas is. however, at least 10 times greater in the cat. ranging from more than 12Omm’ to less than I mm’. The following study of the size and shape of the cat’s pupil was undertaken for two reasons. First we wanted to verify that...
متن کاملPupil size in diabetes.
Sympathetic function was studied in 101 diabetic children and 102 age and sex matched control children, as part of a longitudinal study of the evolution of microvascular disease in the population of diabetic children and adolescents in Avon County. The median (range) age of the diabetic population was 13.5 (6.0-17.2) years, the duration of diabetes was 4.0 (0.4-13.9) years, and glycated haemogl...
متن کاملThe Effects of Age, Refractive Status, and Luminance on Pupil Size
PURPOSE Pupil size is critical for optimal performance of presbyopic contact lenses. Although the effect of luminance is well known, little information is available regarding other contributing factors such as aging and refractive status. METHODS The cohort population comprised 304 patients (127 male, 177 female) aged 18 to 78 years. Pupils were photographed at three controlled luminance leve...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2020
ISSN: 1534-7362
DOI: 10.1167/jov.20.8.4