Implementation of a system for the study of pupillary reflexes using blue and white color stimuli.
DOI:
https://doi.org/10.32870/recibe.v14i3.434Keywords:
Pupillometry, pupillary reflex, blue light, white light, video-oculography, ipRGC, biomarkersAbstract
This work describes the implementation of a video-oculography (VOG) and pupillometry system to measure pupillary reflexes in 20 volunteers (21 ± 3 years old) under blue and white light stimuli in a controlled environment. Although it's a very small sample, the results demonstrate that the system can be useful for obtaining pupillary data, with both the system and the infrastructure employed receiving a positive evaluation. Three 10 ms stimuli were used with 10 s intervals, recording pupillary areas between 3000 and 9000 pixels, with maximum contractions of 3000-5000 pixels. The results show that blue light induces slightly more pronounced contractions (average PCA: 444-449 pixels²) than white light (average PCA: 410-417 pixels²), with a decrease in post-illumination pupillary response (PIPR) in the third cycle due to fatigue of the intrinsically photosensitive retinal ganglion cells (ipRGCs). This system provides a preliminary database for future studies using artificial intelligence to identify potential biomarkers for parasympathetic ocular disorders.References
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