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Pupil Cycle Time Distinguishes Migraineurs From Subjects Without Headache [PDF]
Frontiers in Neurology, 2019 Migraine is a neurological disorder characterized by paroxysms of head pain accompanied by trigeminovascular system activation and autonomic dysfunction. Diagnosis is currently based on clinical diagnostic criteria. Though physiological differences exist
Melissa M. Cortez +4 more
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Uncovering the Characteristics of Pupil Cycle Time (PCT) in Neuropathies and Retinopathies [PDF]
VisionPupil cycle time (PCT) estimates the dynamics of a biofeedback loop established between pupil size and stimulus luminance, size or colour. The PCT is useful for probing the functional integrity of the retinopupillary circuits, and is therefore ...
Laure Trinquet +7 more
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Pupil cycle time and contrast sensitivity in type II diabetes mellitus patients: A pilot study
Indian Journal of Ophthalmology, 2011 Context: Pupil cycle time (PCT) has been widely used for examination of ocular diabetic autonomic neuropathy (DAN). Aims: The primary aim of this study was to evaluate the difference of contrast sensitivity according to PCT results, and the secondary aim
Hoyoung Lee +2 more
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Correlation of Pupil Cycle Time and Postural Hypotension as a Marker for Diabetic Neuropathy [PDF]
Journal of Clinical and Diagnostic Research, 2023 Introduction: Diabetic Neuropathy (DN) can involve autonomic nervous system like cardiovascular system and pupillary reflex. Cardiovascular DN can be measured by estimating the change in Blood Pressure (BP) based on position.
Vasanthi B Kotian, Puneet Hegde
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Edge Light Pupil Cycle Time as A Measure of Optic Nerve Function
Delhi Journal of Ophthalmology, 2011 Purpose: To study pupil cycle time (PCT) in Indian subjects and compare the data with other relevant studies Methods: Fifty subjects from the outpatient department of Guru Nanak Eye Centre were included and evaluated.
J L Goyal +3 more
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Pupil cycle time and its significance in patients with diabetic retinopathy
Journal of Clinical Ophthalmology and ResearchContext: Prolonged pupil cycle time (PCT) is a complication of type II diabetes and becomes more protracted as the disease progresses. PCT can be used as a quick and accurate clinical test to determine how much autonomic neuropathy is influencing a ...
Prasenjit Kalita +3 more
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From Mechanical Instability to Virtual Precision: Digital Twin Validation for Next-Generation MEMS-Based Eye-Tracking Systems [PDF]
SensorsThe development of high-performance MEMS-based eye trackers, crucial for next-generation medical diagnostics and human–computer interfaces, is often hampered by the mechanical instability and time-consuming recalibration of physical prototypes.
Mateusz Pomianek +3 more
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Edge-light pupil cycle time. [PDF]
British Journal of Ophthalmology, 1978 A thin slit-lamp beam illuminating the pupil margin produces clearly visible pupil oscillations. These oscillations can be timed with a stopwatch, thus producing a measurement of the "edge-light" pupil cycle time'. The pupil cycle time is remarkably stable in various testing situations and is repeatable within about +/- 3% over extended periods of ...
S D, Miller, H S, Thompson
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Pupil cycle time and human immunodeficiency virus (HIV) infection [PDF]
Eye, 1993 The pupil cycle time (PCT) was measured in 22 HIV-positive patients and 22 age/sex-matched controls. Of the HIV-positive group, 13 (59%) met the Centre for Disease Control classification of acquired immunodeficiency syndrome (AIDS) defining illness. There was a highly statistically significant difference in the PCT between the HIV-infected group and ...
H, Maclean, B, Dhillon
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