Article
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Revista Mexicana de Ingenieria Biomedica
type: Generically Dependent Continuant
publication venue for: Low-Cost Portable Pupilometer for Circadian Rhythm Studies; [Pupilómetro Portátil de bajo costo para Estudios de Ritmo Circadiano]
type: Document
type: Entity
type: Periodical
type: Collection
type: Journal
type: Thing
type: Continuant
type: Information Content Entity

Continuant
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Generically Dependent Continuant
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Low-Cost Portable Pupilometer for Circadian Rhythm Studies; [Pupilómetro Portátil de bajo costo para Estudios de Ritmo Circadiano]
type: Document
estado: published
issue: 3
type: Generically Dependent Continuant
abstract: Given the price tag of commercially available devices, developing a low-cost, portable pupilometer based on the Raspberry Pi platform is significant for advancing clinical and research applications in neurology and circadian rhythm studies. This study aimed to design and characterize a pupilometer capable of assessing pupillary light response (PLR) to different wavelengths and its relationship with circadian cycles. Using a Raspberry Pi, a no-infrared filter (NoIR) camera, and custom software, the device was tested on a healthy 24-year-old female subject over 20 days, measuring responses to 635 nm (red) and 463 nm (blue) light stimuli at two daily intervals (8:00 AM and 8:00 PM) in both eyes. Results showed that blue light induced greater pupillary constriction than red light (F(1)= 284.37, p=6.9e-27), with more pronounced responses in the morning (F(1)=12.02, p=0.001), likely due to higher parasympathetic activity. Significant lateral asymmetry (F(1)=12.36, p=0.0008) was also observed in the pupillary response to blue light, suggesting potential intracranial factors. These findings demonstrate the pupilometer%27s efficacy in capturing detailed pupillary dynamics, proposing its utility to evaluate pupillary light response in connection with circadian rhythms and lateral asymmetry, providing an affordable solution.
type: Information Content Entity
type: Thing
has publication venue: Revista Mexicana de Ingenieria Biomedica
volume: 45
crisid: 12165
freetext keyword: biomedical instrumentation; circadian rhythms; pupillometry
related by: authorship_76339
e iscopus: 2-s2.0-85210975792
type: Continuant
most specific type: Article
type: Entity
page start: 68
doi: 10.17488/RMIB.45.3.4
page end: 79
type: Article
most specific type: Document
date time value: article date 12165

individual
rights: termsOfUse
date: 2026-08-26T04:00:15
publisher: vivo
type: Document
label: RDF description of Low-Cost Portable Pupilometer for Circadian Rhythm Studies; [Pupilómetro Portátil de bajo costo para Estudios de Ritmo Circadiano] - http://orbis.uaslp.mx/vivo/individual/scopus12164