The 95-minute CT gap
Median time to neuroimaging in the ER is 95 minutes. In that window, pupil assessment with a penlight is the primary neurological screening tool. PupiLUX makes it quantitative.
Subjective data in a time-critical environment
Emergency departments manage 3-5% of patients with acute neurological complaints — head trauma, stroke, altered consciousness, overdose, and envenomation. For these patients, pupillary reactivity is often the first and most accessible neurological sign.
Yet the penlight exam produces subjective, binary data: 'reactive' or 'non-reactive'. The clinically important middle ground — a sluggishly reactive pupil, a subtle asymmetry — is frequently missed or inconsistently documented.
In India, two additional populations make quantitative pupillometry especially valuable: snake bite patients (50,000 deaths/year, with neurotoxic species causing pupillary changes) and organophosphate poisoning (where miosis is both diagnostic and a treatment response marker).
Quantitative, documented, in 7 seconds
PupiLUX provides objective bilateral pupil measurements at the bedside within seconds of patient contact. The PDF report becomes the medical record — no separate charting required.
- Bilateral measurement detects asymmetry that penlight misses
- PDF report auto-generated — the measurement IS the documentation
- Works in any lighting: ER bays, trauma rooms, ambulances
- No capital equipment — runs on the clinician's iPhone
- Under 100 seconds from app launch to shareable PDF
- Quantitative baseline for serial monitoring during ER stay
Key Evidence
Quantitative pupillometry detected pupillary changes during herniation up to 2 hours before clinical deterioration was apparent on standard neurological examination.
Manley GT, Larson MD. “Infrared pupillometry during uncal herniation” J Neurosurg Anesthesiol, 2002.
Ambient lighting significantly affects manual pupil assessment but has minimal impact on quantitative pupillometry, making it reliable across ER lighting conditions.
Ong C, Hutch M, Smirnakis S. “The effect of ambient light conditions on quantitative pupillometry” Neurocrit Care, 2019.
Pupil size monitoring in OP poisoning provides an objective marker for both severity assessment and atropine titration response.
Aravinthan R, et al.. “Pupillary changes in organophosphate poisoning” Indian J Crit Care Med, 2020.
Ready to try PupiLUX?
100 free tests included on install. No credit card required.
Frequently Asked Questions
Can PupiLUX be used during triage?
Yes. The 7-second test fits within a standard triage assessment. The voice-guided workflow means any triage nurse can perform it.
Does PupiLUX work in bright ER lighting?
PupiLUX uses the iPhone's rear torch as a calibrated stimulus. The capture-then-analyze workflow accounts for ambient lighting conditions.
How does the PDF report integrate with EMR?
The PDF can be shared via AirDrop, email, or any iOS sharing mechanism. It's designed to be attached to the patient's electronic medical record as a document.
PupiLUX is not a diagnostic device. For informational and screening purposes only. All clinical decisions must be made by qualified healthcare professionals.