# PupiLUX:Pupillary Light Reflex — Bilateral PLR in 60 Seconds

> iPhone pupillometer for quantitative pupillary light reflex testing and analysis. (iPhone/iPad app by R.Tej Health Analytics Private Limited.)

- Source: https://appshunter.io/ios/app/pupiluxpupillary-light-reflex/id6761528135 (this page in markdown: same URL + `.md`)
- Developer: [R.Tej Health Analytics Private Limited](https://appshunter.io/developer/1740477003)
- Category: Medical, Health & Fitness
- Price: Free with in-app purchases
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 17+
- Requires: iOS 17.0 · 48 MB
- Languages: American English
- Released: 2026-04-07
- Data updated: 2026-08-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/pupiluxpupillary-light-reflex/id6761528135/reviews.md

## What is PupiLUX?

PupiLUX transforms your iPhone into a quantitative pupillometer. Perform bilateral pupillary light reflex (PLR) tests in under 60 seconds — no additional hardware, no consumables, no training required.

WHAT IT MEASURES
— Baseline Pupil Diameter (BPD)
— Constriction Percentage (CP)
— Latency (LAT)
— Maximum Constriction Velocity (MCV)
— Average Dilation Velocity (ADV)
— 75% Recovery Time (T75)
— Relative Afferent Pupillary Defect (RAPD)
— Anisocoria (baseline asymmetry)

HOW IT WORKS
1. Position the iPhone rear camera facing the patient (~12 inches)
2. Voice-guided bilateral recording captures both eyes simultaneously
3. On-device analysis measures pupil dynamics frame-by-frame
4. PupiLUX Pro Report generated with reference ranges

USE CASES
— Neuro-ICU: quantitative pupil monitoring between examination rounds
— Emergency: rapid pupil assessment for trauma triage and documentation

KEY FEATURES
— Bilateral simultaneous testing — one recording, both eyes
— All analysis on-device — no images leave your iPhone
— PupiLUX Pro Report (PDF) with reference ranges and status indicators
— No subscription — pay per test with prepaid credits
— 100 free tests on install, no card required

BUILT BY A CLINICIAN
Created by Dr. Ajay Bakshi — AIIMS-trained neurosurgeon, former CEO of Max Healthcare, Manipal Hospitals, and IHH-India. Built on peer-reviewed clinical evidence and validated against established pupillometry literature.

IMPORTANT NOTICE
PupiLUX is a quantitative measurement and screening tool. It is not a medical device and is not registered with the FDA, CDSCO, or any regulatory body. It does not provide clinical interpretation, diagnosis, or treatment recommendations. All measurements should be interpreted by a qualified healthcare professional.

Visit pupilux.ai for evidence and documentation.

## Key features

- Quantitative pupillometer
- Bilateral PLR testing
- On-device analysis
- Baseline Pupil Diameter measurement
- Constriction Percentage calculation
- PupiLUX Pro Report generation

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 10 Test Credits | $0.99 | one-time |
| 100 Test Credits | $8.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/pupiluxpupillary-light-reflex/id6761528135/reviews.md

### 1/5 — Great idea but needs to be fixed

*2026-04-25*

The general concept is excellent, but the app simply doesnt work well.  Trying to image both eyes within a single video frame isn’t possible.  The video is too far away from the pupil to get high enough resolution.  I would urge the app designers to redesign the app. You need to get two seperate videos of each eye alone (with a closer up video at higher resolution). 

Every single high-quality pupillometer in the world that I’m aware of involves separate, close-up video capture of each eye individually.  

I would love to see this app suceed.  I think the overall concept and design is good. I love the concept of iphone pupillometry.  Please fix it so that it works. 

It would also be great to display graphical curves of the pupil diameter over time.

## Frequently asked questions about PupiLUX

### What is PupiLUX?

PupiLUX is a mobile application that transforms your iPhone into a quantitative pupillometer. It allows for the rapid, on-device measurement and analysis of pupillary light reflex (PLR).

### What does PupiLUX measure?

PupiLUX measures several key pupil dynamics including Baseline Pupil Diameter (BPD), Constriction Percentage (CP), Latency (LAT), Maximum Constriction Velocity (MCV), Average Dilation Velocity (ADV), 75% Recovery Time (T75), Relative Afferent Pupillary Defect (RAPD), and Anisocoria.

### Is PupiLUX a medical device?

No, PupiLUX is a quantitative measurement and screening tool. It is not a medical device and is not registered with regulatory bodies like the FDA. All measurements should be interpreted by a qualified healthcare professional.

### How does PupiLUX work?

You position the iPhone rear camera facing the patient, and voice-guided bilateral recording captures both eyes simultaneously. The app then performs on-device analysis of pupil dynamics frame-by-frame.

### What are the use cases for PupiLUX?

PupiLUX is useful for quantitative pupil monitoring in Neuro-ICU settings between examination rounds and for rapid pupil assessment in emergency situations for trauma triage and documentation.

### Does PupiLUX have ads?

No, PupiLUX does not contain advertisements. The application is ad-free.

### How is PupiLUX priced?

PupiLUX offers 100 free tests upon installation with no card required. Subsequent tests are purchased with prepaid credits, meaning there is no subscription required.

### What devices does PupiLUX support?

PupiLUX is available for iPhone and iPad devices.

## Version history (last 5 releases)

### 1.07 — 2026-06-17

What's New in This Version (release notes for build 9)
  • New free trial: 20 assessments over 14 days to get you started.
  • Purchase credit packs anytime — purchased credits never expire.
  • Improved accuracy of the dilation-velocity (ADV) metric: now shows
    "N/A" when there's no measurable re-dilation, instead of a misleading 0.0.
  • Stability and reliability improvements.

### 1.06 — 2026-05-08

Fixes
  • Demo video audio now plays correctly when the iPhone is set to silent.

Pro Report
  • Banner and findings now read "Asymmetric Pupillary Light Response" / "Light Response Asymmetry", with a clarifying methods note that PupiLUX measures bilateral light response asymmetry as a smartphone-derived surrogate for clinical RAPD and does not perform a swinging-flashlight test.
  • Disclaimer aligned to the regulatory measurement-tool framing.
 • Each Pro Report PDF now shows the per-test L/R valid-frame percentages, so the clinician can judge bilateral comparison reliability at a glance.

Measurement stability
  • Improved outlier rejection during the pre-flash baseline phase (no impact on the constriction-recovery signal). Reduces run-to-run variance on low-amplitude traces.

### 1.05 — 2026-04-28

Bug fixes and reliability improvements:

  • Cleaner result images — eye crops now show just the iris and pupil outlines without the technical labels.
  • Test history now opens images on the first tap — no more placeholder X.
  • Share Pro Report (PDF) reliably opens the share sheet.
  • Sync indicator drains in the background and now also retries on tap.
  • Credits persist across app delete and reinstall on the same iPhone.

  Thank you to the clinicians who reported these.

### 1.04 — 2026-04-12

Reliability & Purchase Experience improved: 
   — Credit purchases are now verified end-to-end with Apple's latest server API
   — Purchases interrupted by app close or network loss now complete automatically when you return
   — Restore Purchases shows a clear summary of what was found and your updated balance
   — Credit balance refreshes automatically when returning to the app
   — Family Sharing approval flows now handled gracefully with a dedicated notification
   — Improved server-side purchase verification and reconciliation

### 1.03 — 2026-04-10

Instant purchase confirmation — credits appear immediately with haptic feedback and thank-you screen. Improved reliability of credit delivery

## More apps by R.Tej Health Analytics Private Limited

- [U Be Fit](https://appshunter.io/ios/app/u-be-fit/id6484069752)
- [EMMA: Glaucoma Companion](https://appshunter.io/ios/app/emma-glaucoma-companion/id6777007849)

All apps by R.Tej Health Analytics Private Limited: https://appshunter.io/developer/1740477003

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*