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Pupilmate: A do-it-yourself frugal pupilometer.

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This study introduces Pupilmate, a low-cost, DIY pupillometer for assessing pupillary reflexes. This tool enables affordable neurological screening and documentation of pupillary defects in various clinical settings.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Biomedical Engineering

Background:

  • Pupillary reflexes are crucial for non-invasive neurological assessment.
  • Existing tools for pupillary defect screening lack affordability and accessibility.
  • There is a need for low-cost, portable devices for pupillary reflex documentation.

Purpose of the Study:

  • To describe the construction and functionality of a frugal, do-it-yourself handheld pupillometer device named Pupilmate.
  • To provide an affordable solution for screening and documenting relative afferent pupillary defects.
  • To enable objective recording and repeatability of pupillary reactions.

Main Methods:

  • Constructed a handheld device (Pupilmate) using Wi-Fi-enabled cameras, infrared (IR) and white light LEDs, and a cardboard box.
  • Integrated simultaneous video streaming of both pupils to internet-connected devices.
  • Enabled manual illumination for recording direct and consensual pupillary reflexes.

Main Results:

  • Pupilmate allows for objective observation and repeatable recording of pupil reactions.
  • The device successfully captures direct and consensual pupillary reflexes.
  • Simultaneous video streams of both pupils are achievable via internet-connected devices.

Conclusions:

  • Pupilmate offers a cost-effective and accessible method for pupillary reflex assessment.
  • The device is suitable for initial screening in outpatient departments, outreach programs, and clinics.
  • This DIY pupillometer addresses the need for affordable neurological eye assessment tools.