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Alpha EEG activity and pupil diameter coupling during inactive wakefulness in humans
(Soc Neuroscience, 2022)
Variations in human behavior correspond to the adaptation of the nervous system to different internal and environmental demands. Attention, a cognitive process for weighing environmental demands, changes over time. Pupillary ...
Assessing Rod, Cone, and Melanopsin Contributions to Human Pupil Flicker Responses
(Association for Research in Vision and Ophthalmology, 2014-02)
Purpose: To determine the relative contributions of rods, cones and melanopsin to pupil responses in humans using temporal sinusoidal stimulation for light levels spanning the low mesopic to photopic range. Methods: A ...
Effects of different mydriatics on intraocular pressure, pupil diameter, and ruminal and intestinal motility in healthy sheep
(Wiley-Blackwell, 2014-11-01)
Objective To determine the effects of the administration of subconjunctival 1% atropine (SA), topical 1% atropine (A), 0.5% tropicamide (T), 1% homatropine (H), 10% phenylephrine (P), and 2% ibopamine (I) on intraocular ...
Corneal aberrations in keratoconic eyes: influence of pupil size and centering
(IOP Publishing, 2011-02)
Ocular aberrations vary among subjects and under different conditions and are commonly analyzed expanding the wavefront aberration function in Zernike polynomials. In previous articles, explicit analytical formulas to ...
Pupil size tracks attentional performance in attention deficit / hyperactivity disorder
(Nature Publishing Group, 2017)
Attention-deficit/hyperactivity disorder (ADHD) diagnosis is based on reported symptoms, which carries the potential risk of over- or under-diagnosis. A biological marker that helps to objectively define the disorder, ...
Pupil Size Tracks Attentional Performance in Attention-Deficit/Hyperactivity Disorder
(Nature Publishing Group, 2017)
© 2017 The Author(s). Attention-deficit/hyperactivity disorder (ADHD) diagnosis is based on reported symptoms, which carries the potential risk of over-or under-diagnosis. A biological marker that helps to objectively ...
Pupillary response to negative emotional stimuli is differentially affected in meditation practitioners
(Frontiers Media S. A, 2017)
© 2017 Vasquez-Rosati, Brunetti, Cordero and Maldonado.Clinically, meditative practices have become increasingly relevant, decreasing anxiety in patients and increasing antibody production. However, few studies have examined ...
Avaliacao do efeito do diclofenaco de sodio topico sobre a midriase e sintomas oculares apos dilatacao pupilar
(1999-01-01)
The aim of this study was evaluate the effectiveness of the sodium diclophenac on the mydriasis induced by drugs and on the tearing, blepharospasm and photophobia in normal individuals that received mydriatic or cycloplegic ...
Resultados preliminares de um sistema computadorizado e estereoscópico para pupilometria in vivo
(Conselho Brasileiro de Oftalmologia, 2008-12-01)
PURPOSE: We developed a digital system with accommodation capacities for measurement of the diameter and shape of the in vivo pupil for 10 different levels of illumination intensity, varying from mesopic to photopic. ...
Development of a low cost pupillometer-eyetracker and applications
(Spie, 2013-11)
The determination of ocular pupil diameter and gaze direction is important in various psychophysical and cognitive tests and can be accomplished using commercial, academic or open-source devices. In this work we develop a ...