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An Arduino-Powered Device for the Study of White Perception beyond the Visual Chromatic Critical Flicker Fusion

Francisco J Ávila¹

¹Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain.

Journal of Imaging

|July 26, 2024

Summary

This study introduces a low-cost RGB LED flicker device to measure visual chromatic temporal resolution using critical flicker fusion frequency (CFF). Findings show high-order aberrations enhance visual temporal resolution, independent of macular function.

Keywords:

Arduino color vision critical flicker frequency fusion high-order aberrations photo-stress recovery time temporal vision

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Area of Science:

Biomedical Engineering
Ophthalmology
Visual Neuroscience

Background:

Arduino microcontrollers are versatile tools in technological and biomedical fields.
Assessing visual function, particularly chromatic temporal resolution, is crucial for diagnosing visual impairments.

Purpose of the Study:

To develop a cost-effective mini-device using RGB LED flicker stimulation for critical flicker fusion frequency (CFF) measurement.
To investigate the relationship between CFF, macular function (photo-stress recovery time - PRT), and high-order aberrations.

Main Methods:

Assembly and testing of a novel RGB LED flicker stimulation device.
Measurement of CFF for red, green, and blue stimuli in thirty young subjects.
Assessment of macular function using photo-stress recovery time (PRT).
Wavefront aberrometry to analyze high-order aberrations.

Main Results:

The device successfully demonstrated steady white visual perception beyond CFF.
Macular function (PRT) was independent of CFF for individual red, green, and blue lights.
A statistical correlation was observed between contrast modulation for red/green CFF and PRT.
High-order aberrations were found to improve visual temporal resolution.

Conclusions:

The developed device offers a cost-effective method for assessing chromatic temporal resolution.
Visual temporal resolution is influenced by high-order aberrations, suggesting a complex interplay of visual processing.
Further research can explore the clinical applications of this CFF measurement technique.