20 papers · ranked by Valyu relevance
Lauren Fink, Jaana Simola, Alessandro Tavano, Elke Lange + 2 more
The pupil of the eye provides a rich source of information for cognitive scientists, as it can index a variety of bodily states (e.g., arousal, fatigue) and cognitive processes (e.g., attention, decision-making). As pupillometry becomes a more accessible and popular methodology, researchers have proposed a variety of…
Mazziotti Raffaele, Carrara Fabio, Viglione Aurelia, Lupori Leonardo + 6 more
Pupil dynamics alterations have been found in patients affected by a variety of neuropsychiatric conditions, including autism. Studies in mouse models have used pupillometry for phenotypic assessment and as a proxy for arousal. Both in mice and humans, pupillometry is non-invasive and allows for longitudinal…
Wioletta Nowak, Anna Żarowska, Elżbieta Szul-Pietrzak, Marta Misiuk-Hojło
'Marta Misiuk-Hojło'] Background An objective and noninvasive examination of pupil size variability can be used to assess the activity of the autonomous nervous system. We designed a system that enables binocular, fast, and accurate recordings of different types of pupil variabilities, which are synchronous with other…
Łukasz Lisowski, Jolanta Lisowska, Anna Charytonowicz, Zofia Mariak + 2 more
Background/objectives The pupil, a dynamic ocular structure, serves as a critical indicator of neurological and ophthalmological function. This interdisciplinary review explores the anatomical, physiological, and pathological aspects of pupillary reflexes and disorders. Content Emphasis is placed on the diagnostic…
Michal Tepper, Omer Ben Barak-Dror, David Haggiag, Israel Gannot + 1 more
Significance Accurate monitoring of pupil size and gaze direction is critical in clinical and research contexts; however, current pupillometry methods require open eyes, limiting their use in patients under anesthesia, sedation, or sleep. Short-wave infrared (SWIR) imaging enables noninvasive closed-eye pupillometry…
Sharif I. Kronemer, Victoria E. Gobo, Joshua B. Teves, Diana C. Burk + 4 more
Pupillometry is a popular method because pupil size is an easily measured and sensitive marker of neural activity and associated with behavior, cognition, emotion, and perception. Currently, there is no method for monitoring the phases of pupillary fluctuation in real time. We introduce rtPupilPhase – a software that…
Ralf Schmälzle, Juncheng Wu, Sue Lim, Gary Bente
The eye is the vanguard of the reception process, constituting the point where visual information arrives and is transformed into neural signals. While we view dynamic media contents, a fine-tuned interplay of mechanisms causes our pupils to dilate and constrict over time - and putatively similarly across audience…
Shawn T. Schwartz, Haopei Yang, Alice M. Xue, Mingjian He
Pupillometry provides a non-invasive window into the mind and brain, particularly as a psychophysiological readout of autonomic and cognitive processes like arousal, attention, stress, and emotional states. Pupillometry research lacks a robust, standardized framework for data preprocessing, whereas in functional…
Charikleia S. Vrettou, Paraskevi C. Fragkou, Ioannis Mallios, Chrysanthi Barba + 5 more
'Chrysanthi Barba' 'Charalambos Giannopoulos' 'Evdokia Gavrielatou' 'Ioanna Dimopoulou' 'Kenji Dohi' 'Yoichi Morofuji'] Pupillometry, an integral component of neurological examination, serves to evaluate both pupil size and reactivity. The conventional manual assessment exhibits inherent limitations, thereby…
Shawn T Schwartz, Haopei Yang, Alice M Xue, Mingjian He
Pupillometry provides a non-invasive window into the mind and brain, particularly as a psychophysiological readout of autonomic and cognitive processes like arousal, attention, stress, and emotional states. Pupillometry research lacks a robust, standardized framework for data preprocessing, whereas in functional…
Abhijeet Phatak, Aditya Chandra Mandal, Janarthanam Jothi Balaji, Vasudevan Lakshminarayanan
'Vasudevan Lakshminarayanan'] Abstract: Pupil reflex to variations in illumination and associated dynamics are of importance in neurology and ophthalmology. This is typically measured using a near Infrared (IR) pupillometer to avoid Purkinje reflections that appear when strong Visible Light (VL) illumination is…
Darlene Barker, Haim Levkowitz
In this study, we present a method for emotion recognition in Virtual Reality (VR) using pupillometry. We analyze pupil diameter responses to both visual and auditory stimuli via a VR headset and focus on extracting key features in the time-domain, frequency-domain, and time-frequency domain from VRgenerated data. Our…
Oswald Barral
Pupillometry has been studied for over a century, but it has just recently started being used in human-computer interaction setups. Traditionally, pupil size has been used as an indicator of cognitive workload and mental effort. However, pupil size has been linked to other cognitive processes as well, ranging from…
Andrew J. Zele, Paul D. Gamlin
The pupil response is more than a simple light evoked reflex (1). At any moment, pupil diameter reflects the activity of complex neurological pathways to changes in the environmental illumination and autonomic activity through parasympathetic and sympathetic innervations (2). A mobile pupil also modulates retinal…
A. Margaritakis, G. Anyfantaki, K. Mouloudakis, Aikaterini Gratsea + 1 more
'I. K. Kominis'] Quantum vision is currently emerging as an interdisciplinary field synthesizing the physiology of human vision with modern quantum optics. We recently proposed a biometric scheme based on the human visual system's ability to perform photon counting. We here present a light stimulus source that can…
Rebecca Grzadzinski, Raymond S. Carpenter, Josh Rutsohn, Alapika Jatkar + 8 more
Pupil changes in response to well-controlled stimuli can be used to understand processes that regulate attention, learning, and arousal. This study investigates whether pupil dynamics to social stimuli are associated with concurrent adaptive behavior in typically developing infants. To accomplish this, we developed and…
Authors not listed
—Cognitive load, the mental effort required during working memory, is central to neuroscience, psychology, and human computer interaction. Accurate assessment is vital for adaptive learning, clinical monitoring, and brain–computer interfaces. Physiological signals such as pupillometry and electroencephalography (EEG)…
Akhil Meethal, Anita Paas, Nerea Urrestilla Anguiozar, David St-Onge
The demand for cognitive load assessment with low-cost easy-to-use equipment is increasing, with applications ranging from safety-critical industries to entertainment. Though pupillometry is an attractive solution for cognitive load estimation in such applications, its sensitivity to light makes it less robust under…
Carina Kelbsch, Torsten Strasser, Yanjun Chen, Beatrix Feigl + 9 more
'Paul D. Gamlin' 'Randy Kardon' 'Tobias Peters' 'Kathryn A. Roecklein' 'Stuart R. Steinhauer' 'Elemer Szabadi' 'Andrew J. Zele' 'Helmut Wilhelm' 'Barbara J. Wilhelm'] The number of research groups studying the pupil is increasing, as is the number of publications. Consequently, new standards in pupillography are needed…
Jean-Baptiste Durand, Sarah Marchand, Ilyas Nasres, Bruno Laeng + 1 more
In humans, the eye pupils respond to both physical light sensed by the retina and mental representations of light produced by the brain. Notably, our pupils constrict when a visual stimulus is illusorily perceived brighter, even if retinal illumination is constant. Yet, it remains unclear whether such perceptual…