Claudio M. Privitera

Pupillary unrest is attenuated in attention deficit hyperactivity disorder (ADHD)

Claudio M. Privitera, Sean Noah, Thom Carney, Stanley A. Klein et autres

We investigated the phenomenon of pupillary unrest in individuals with Attention Deficit Hyperactivity Disorder (ADHD) compared to neurotypical controls. We measured the power of low-frequency pupil oscillations under two experimental conditions: a passive condition with minimal distraction and a resting condition with …

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Pupillometer to Predict Postoperative Opioid-Induced Respiratory Depression in Children

Jeffrey W. Oliver, Charles I. Abramson, Claudio M. Privitera, Senthilkumar Sadhasivam

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Prediction of neurocritical care intensity through automated infrared pupillometry and transcranial doppler in blunt traumatic brain injury: the NOPE study

Fabio Silvio Taccone, Dimitri Sourd, Claudio M. Privitera, Jean‐Luc Bosson et autres

PURPOSE: This pilot study aimed to determine the capacity of automated infrared pupillometry (AIP) alone and in combination with transcranial doppler (TCD) on admission to rule out need for intense neuroAQ2 critical care (INCC) in severe traumatic brain injury (TBI). METHODS: In …

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Pupillary dilations in a Target/Distractor visual task paradigm and attention deficit hyperactivity disorder (ADHD)

Claudio M. Privitera, Sean Noah, Thom Carney, Stanley A. Klein et autres

ADHD is a neurocognitive disorder characterized by attention difficulties, hyperactivity, and impulsivity, often persisting into adulthood with substantial personal and societal consequences. Despite the importance of neurophysiological assessment and treatment monitoring tests, their availability outside of research settings remains limited. Cognitive neuroscience …

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A differential of the left eye and right eye neurological pupil index is associated with discharge modified Rankin scores in neurologically injured patients

Claudio M. Privitera, Sanjay V. Neerukonda, Venkatesh Aiyagari, Shoji Yokobori et autres

BACKGROUND: Automated infrared pupillometry (AIP) and the Neurological Pupil index (NPi) provide an objective means of assessing and trending the pupillary light reflex (PLR) across a broad spectrum of neurological diseases. NPi quantifies the PLR and ranges from 0 to 5; in …

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Clinical Correlation Between Vertical Gaze Palsy and Midbrain Volume in Progressive Supranuclear Palsy

Karen A Buch, Marc A. Bouffard, Randy H. Kardon, Anne-Marie A. Wills et autres

BACKGROUND: Supranuclear vertical gaze palsies and slowed vertical saccades are characteristic clinic features of progressive supranuclear palsy (PSP). The "hummingbird sign," reflective of midbrain atrophy, is a classic radiographic sign of PSP. Correlation between eye movement abnormalities and radiographic findings in PSP …

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The Photomotor Response - Dynamic Quantification by a Portable Pupillometer

Jurij Rosen, Claudio M. Privitera, Resul Bulmus, Makoto Nakamura et autres

The pupillary light reflex (PLR) is a key component of the physical examination as it reliably tests the functional integrity of the neuromuscular loop between pupil and midbrain. Unlike the traditional manual testing the PLR with a penlight that frequently leads to …

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Transverse chromatic offsets with pupil displacements in the human eye: sources of variability and methods for real-time correction

Alexandra E. Boehm, Claudio M. Privitera, Brian P. Schmidt, Austin Roorda

Tracking SLO systems equipped to perform retinally targeted stimulus delivery typically use near-IR wavelengths for retinal imaging and eye tracking and visible wavelengths for stimulation. The lateral offsets between wavelengths caused by transverse chromatic aberration (TCA) must be carefully corrected in order …

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Transverse chromatic offsets with pupil displacements in the human eye: Sources of variability and methods for real-time correction

Alexandra E. Boehm, Claudio M. Privitera, Brian P. Schmidt, Austin Roorda

Abstract Tracking SLO systems equipped to perform retinally targeted stimulus delivery typically use near-IR wavelengths for retinal imaging and eye tracking and visible wavelengths for stimulation. The lateral offsets between wavelengths caused by transverse chromatic aberration (TCA) must be carefully corrected in …

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Real-time compensation for dynamic changes in transverse chromatic aberration with pupil decentration in a tracking scanning laser ophthalmoscope

Alexandra E. Boehm, Claudio M. Privitera, Austin Roorda

In the last decade, image-based eye tracking has been used in conjunction with scanning laser ophthalmoscopy (SLO) to achieve stabilized stimulus delivery. This has proven useful for microperimetry testing of patients with visual impairment and in psychophysical experiments aiming to elucidate the …

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Mapping the spatial extent of perceptive fields for flicker adaptation using retinally stabilized stimuli

Alexandra E. Boehm, Dennis M. Levi, Claudio M. Privitera, Austin Roorda

When an image is stabilized on the retina, it fades from perception due to local adaptation of neurons with receptive fields that are fixed in retinal space. We were interested in mapping the perceptive fields (PF) - the psychophysical equivalent of receptive …

Transverse chromatic aberration across the visual field of the human eye

Simon Winter, Ramkumar Sabesan, Pavan Tiruveedhula, Claudio M. Privitera et autres

The purpose of this study was to measure the transverse chromatic aberration (TCA) across the visual field of the human eye objectively. TCA was measured at horizontal and vertical field angles out to ±15° from foveal fixation in the right eye of …

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