Hi team, I want to use this: pl-neon-recording Python library, to export my native recording data to surface-gaze fixationn data. I cannot follow the guide from your website: https://docs.pupil-labs.com/neon/neon-player/surface-tracker/#workflow. Can I use the Surface Tracker with the Python library to export all my recordings in bulk? My recordings are exported locally via USB-C Cable from the phone. It looks like I have to export each recording separately from Neon Player?

Hi! I have a question regarding the companion smartphones for the Neon and the Invisible. We have one Invisible and one Neon which came with their companions smartphones. Can we use the Invisible phone also for the Neon and the Neon phone for the Invisible?

Hi! I am inserting some PLEvent components into routines in PsychoPy Builder and am receiving the following error messages. " return computer_time + self._time_offset_estimate.time_offset_ms.mean / 1e3 AttributeError: 'NoneType' object has no attribute 'time_offset_ms' " I have defined the onset/offset of the components so I am not sure where the offset might be getting lost. Any thoughts on troubleshooting whould be helpful. Thanks! -Eric

Hi there! We are in the process of ordering the Pupil Labs Neon eye-tracking glasses, and it is my understanding that they ship with a Samsung Galaxy S25 as the companion device. Our goal is to integrate the glasses with a Qualisys motion capture system.

We are considering using a Linksys MR7350 router for this setup. Could you confirm whether this router would be suitable, or if you would recommend alternative models? We’d appreciate your recommendations regarding router compatibility (like the one posted in a previous message: TP-Link TL-WR841N N300 WLAN router) and performance when paired with the Samsung Galaxy S25 companion device.

Hello, I downloaded the Pupil Labs plugin for Psychopy Builder on a PC. I am using psychopy 2025.1.1 and pupil labs neon recording 1.0.3. However, there are no drop-down boxes available to change the IP address and port (see photo). Any idea what is happening here or how to fix it?

hello, can the gaze offsett correction on the neoplayer have 3 digits precision?

Hi, @user-f4b730 - sure, that's a pretty simple change. Are you able/willing to run from source? I've already pushed the change, but it's maybe too minor to justify a release by itself

ok, I see, how can I run it from source?

Hi, @user-ff60f7 👋. Yes, that's correct. They'll be shipping with an S25. In terms of router, in principle, the one you mention should work just fine. Although we have had a lot of success with the afformentioned TP Link model. So that's what I recommend.

Hi team, may I receive any feedback on my recordings? It seems that the recorded gaze has a systematic shift toward the bottom. May I know how I can improve the tracking accuracy? here is my recording: https://hkustconnect-my.sharepoint.com/:v:/g/personal/yyangib_connect_ust_hk/EQ56jrm2_o5Alc4ZrS_bIfMBLlciUd3T55GjQW81WRfKZw?e=c7IDcS

Hi all! Have two questions i was hoping someone could help with - Is there a way to shorten an eye tracking video so i can use it as a reference video (i forgot to shoot a proper one) - Does anybody have a smart alternative for pupil lab case for the neon? It is a nice case, but would like to have something smaller so i can put it in my handbag

Good morning! I would like to inquire If in the Neon Eye-tracker whether head rotation is taken into consideration when generating the gaze maps.

Hi there, we ran into a problem with the android app gui disappearing into the background after launching it. It takes a couple of seconds after opening the application until this happens. We tried restarting the device, connecting / disconnecting wifi, manually closing the app etc., but nothing worked. We also recorded the process in a video which I can dm you, if necessary. The app is running on a OnePlus 10T and we did not encounter this behavior in the last couple of months. Do you have any suggestions?

Hello@user-f43a29, Neon's companion software needs to be downloaded through Google Store, but because Google cannot access it in my area, I would like to ask if it is possible to provide the corresponding APK file? Thank you.

Companion app on Google Play Store

Thread

Dear Pupil Labs team,

I am using Pupil Cloud for eye movement analysis and would like to confirm the exact settings of the fixation and saccade detection algorithm. Specifically, I would like to know:

Which velocity and duration thresholds are used to classify a saccade?

Which criteria (e.g., velocity, dispersion, minimum duration) are applied to define a fixation?

Are these parameters fixed in Pupil Cloud, or can they be adjusted by the user?

In some eye-tracking systems, thresholds around 30°/s for fixations and 40°/s for saccades, with minimum fixation durations of 80 ms, are commonly reported. Could you please confirm whether these values are applied in Pupil Cloud, or clarify which exact thresholds your software uses?

Thank you very much for your attention and support.

Best regards, Alejandro

Hi @user-cdcab0, I asked this question a while ago and it wasn't a feature back then. Is real-time blink detection when using neon and Psychopy a feature now? Sorry if this was in one of the updates, I haven't been following lately and I just got back to work

Trying to use neon with psychopy builder. I am receiving RPC_DEVICE_RUNTIME_ERROR on psychopy. I am also receiving "ioHub Server Process Completed With Code: 0". I have neon connected via wifi and neon monitor can view the camera on the browser. Psychopy does not seem to recognize or find neon. I tried lots of things, reinstalling the package, setting the companion address to the ip address (neon monitor can be accessed with neon.local:8080). Looking for help with this last piece of the connection.

Hi team, may i check if I use pupil_labs.neon_recording.open to read the local recordings, what are .gaze.ts and .scene.ts and .event.ts? Particularly, scene.ts and event.ts, are they the onset time? It seems that the onset of gaze is earlier than the onset of the scene

Is this the correct way to map the gaze, video frame index, event using the same timestamp>

Hi, two questions regarding Neon. Firstly has the streaming on the World View camera views to an IOS system been resolved and with our nonprescription lens the magnets on one of the lens have for some strange reason come away so we can’t attach it back on so Im wondering if it’s possible to get a spare lens?

Thanks @user-480f4c for getting back to me and I will photo the magnet and send it over.

Hi guys 👋 has anyone worked on obtaining the visual axis using Neon or knows of any references on how to calculate it? Also, has anyone tried projecting vectors using the optical axis through eye centers to estimate gaze position data — is this method legit?

Hi guys, I have the automatic upload to cloud on the companion device of the neon lab glasses, but I deleted the video from the cloud workspace by mistake, but it’s still on the phone, how can I reupload it to the cloud?

Hi all! I just downloaded Neon Player and am having trouble finding a way to add or edit AOIs. Is the Neon Player capable of setting AOIs, or is that a function only available in the Pupil Cloud?

This means that I cannot have duration for each gaze data point I have, right?

Hi! I have a similar question about setting AOIs in the Neon Player - is there any way to set surfaces across multiple recordings? Or do we have to set surfaces for each individual recording (and setting AOIs across multiple recordings is only a feature available in the Pupil Cloud)?

If all available data (full player-compatible package) are downloaded, saved offline, and then deleted from Pupil Cloud, can these data be re-uploaded to Pupil Cloud at a later time (restoring the original capture)? If so, how?

Separate Question: Is there any common wisdom on how to filter fixations based on the confidence value (0,1) indicated in 'fixation detected on surface' column in the 'fixations_on_surface' output file from Neon Player? And, is there any such confidence that is computed for fixations on AOIs built in Pupil Cloud? In output files for Pupil Cloud, I only find a total list of fixations/AOI, whereas in the output files for Neon Player, I find fixations and associated confidences/surface. Maybe my underlying question is more about the difference between the surface and AOI. Thanks!

Hi Team, when I tried to run the PsychoPy program, it says calibration with the host IP failed. Later on, when I tried it several times, it worked. May I know what is going on? Sometimes, it takes a while to connect the host device to the laptop's program.

Hello, when I am running the Psychopy program, the host phone does not connect to the program, and the bug says cannot calibrate. After a while, the program can run smoothly, although I did not fix anything. I wonder why this happens sometimes? Thx!

The psychopy log is saved to a file in your .psychopy3 folder. It's overwritten every time you launch PsychoPy, so you need to make sure you grab it right after it happens

As for one of the recordings, I calibrated to ensure accuracy using the offset function. Also checked the eyeview to be captured during the recording, but it seems that the red circle is a bit off. I want to check if this is normal. Thx

for offset, we create small rectangle shapes on the computer screen. so the target viewing distance should be the same too

Hi all! My name is Nitya and I am a Master's student working on trying to identify blinks versus saccades in our collected data as automatic blink detection data is not available. Upon plotting the pupil size relative to time, I noticed that there seemed to be frequent dips in pupil size. I predict that this could correlate to blinking but wanted to check if anyone had any insights as to what could be causing these dips or if there was any other way to detect blinks. Thank you, Nitya

Hi @user-f43a29! Thank you for the reply. Nitya is working with me and I have been talking with @user-cdcab0 regarding blink detection. Our data is streamed from Psychopy and due to IRB regulations we cannot use Pupil Cloud or the raw eye recordings. The time series data produced by Psychopy is the only thing we can work with in this particular study. Blink detection from Paychopy has not been implemented yet so we have to make our own algorithm to do that with what we already have.

And this pupil diameter drops are the only meaningful blink indicator we have seen in the data so far. So we are wondering if you could share any insight as to what could we do to better detect blinks from the data we have

Hi @user-cdcab0, We are doing a classroom study and we set up the AprilTags on the corners of the screen. However, they are not being detected. My suspicion is that it will be hard to include these when individuals are further back. Can you provide some guidance on this? (We need to define AOIs for later data analysis)

Hello. We have exchanged our pupillabs neon eyetracking module for a new one due to a defect. Now when using pupil cloud the old module is still registered for unlimited space, while the new module cannot be activated for unlimited space. How can we register the new eye-tracker module in pupil cloud with our old license?

old: 263231 -> new: 595697

the new one also indicates that there is 7h of data recorded, but we have no access to this recorded data in another account (I guess the data was recorded by pupil labs, not us)

Hi @user-f43a29 thank you so much for your quick reply. I will send an email now.

Hi team, when we use an extension hub to connect the eye tracker, charger, and mobile phone after some experiment blocks, the following prompt pops up on the Neon app“Sensor failure The Companion App has stopped recording extimu data! Stop recording, unplug your Neon device and plug it back in. If this behavior persists, it may indicate hardware issue. Please reach out to our support team for help."

So we removed the hub, directly connected the eye tracker to the mobile phone, and closed the small window. The recording display continued recording, and we asked the participants to look at the four corners and the center of the screen to ensure that the eye tracking was functioning. When the recording automatically ends after the experiment finishes, we found out that the recording was only 4 minutes and 58 seconds. But if we do not click into the video, it shows as an 8-minute video.

thanks!

Hello. Could you explain the distortion correction for Marker Mapper or Surface Tracker? If 2D barcodes are placed in the environment with tilt relative to the Neon module's IMU, how does this affect the definition of the ROI? Please discuss the tilt along each axis: X (pitch), Y (roll), and Z (yaw).

Hello. I am a new PhD student in the field of rehabilitation robotics and am using Neon to detect objects of interest and calculate viewing distance. In your Pupil Labs fixation detector whitepaper, there is a following explanation of using IMU to calculate optic flow.

Where can a find the corresponding code?

Hi again! I am using the Neon Player to define surfaces and AOIs, and I just notice that when I load a recording, it seems to automatically begin finding the surface, and progress is shown in this cache. Great! But, do I need to open up every recording in the Neon Player before the surfaces can be found, and then export each recording? In other words, as I make new recordings with the same experiment (on-screen video with April Tags) do I still need to individually open each recording in Neon Player in order for the surfaces to be defined?

Hi guys! I’m having an issue with creating enrichments for a study I’m doing. The reference image mapping enrichments keep erroring out on each of the 10 samples I have. I’ve tried several different scan recordings and reference images but keep having the same issue. Is any one able to assist?

I can see this has been asked before but I couldn't see a reply, so apologies for the double question!

When adding a gaze offset in Pupil Cloud, is there a way to do it more precisely? We're getting participants to look at a target, and it can be difficult to tell if the gaze is consistently offset in a particular direction and needs correcting or if the variation of the gaze from the target is just expected variation. It can also be difficult to tell exactly how much the gaze needs correcting, because at some points in time the variation will be less than others - is there a way to calculate the average gaze variation from a particular point in the scene camera over a period of time and then correct the gaze by that amount?

Also, is there a way to correct it other than dragging and dropping with the mouse? It's more accurate than doing it in the app, but it would be nice to have finer control by being able to enter coordinates or even being able to nudge it left/right/up/down using arrow keys once it's placed to make it more precise.

I saw another user mention that it would be great if we could use a target (like a QR code) that the glasses can automatically recognise and calculate the gaze offset from that point over a specified period of time (when the participant is looking at it), but I assume that isn't possible?

Does anyone have any suggestions for lining up the timestamps in gaze_positions_on_surface.csvs with the frames from the world video?

gaze_positions_on_surface.csv does not start at exactly the same timestamp as the world_timestamps.csv (the first value in one is 1755530803833957766 and in the other, 1755530802581479680, which is about one second difference or less, but still problematic to not have things lined up exactly especially since exports from Neon Player only give gaze positions and not fixations, so fixations have to be manually calculated), so I'm also unsure why there would be a discrepancy there. Also when I converted those values to Universal Time in R, the time it gave me did not match anything in the export_info.csv either.

Knowing the timing of events and fixations in my experiment is really important, but I am struggling to figure out how to know when in the gaze_positions_on_surface.csv an event occurs in the world video. I can imagine this is something someone else probably figured out how to do though?

Hello,

I have two recordings that are each around 30 minutes long, with events already marked. I just realized that for enrichments, the videos cannot be longer than 3 minutes. Is there a way to crop or trim the videos so I can run enrichments only on the specific event segments?

Thank you for your help!

Hi Pupil Lab team! Would someone be able to clarify the units for the gaze in the x, y, z directions as well as the units for and difference between device_time, logged_time, and time? Thank you!

Let me ask another question while another thread is being processed. The following page states that Yaw convergence takes time, but is there any reference data available? I understand it is significantly influenced by the surrounding environment, but it would be helpful to have data showing the relationship between elapsed time and error rate. https://docs.pupil-labs.com/neon/data-collection/calibrating-the-imu/

@user-08dfba thanks for sharing more context. Just to clarify, since the enrichments Test and P1 are identical, and P1 has already been completed successfully, is there anything specific preventing you from using the output of P1?

are there any other enrichments that haven't been completed?

@user-480f4c so that YardHouse workspace was a past project that I was trying to test things on. The current project is that second workspace I shared access to is where we first experienced the issues. So that new test enrichment was just a troubleshooting test

Hi! Is there a way to change gaze data capture rate post collection in pupil cloud / on neon player app? say I recorded gaze data at 200hz and wanted to downsample to 100hz, or vice versa

[email removed] ! Let’s try to break it down

Hello, I am still having some trouble downloading the data from the project in the cloud. I manage to download it eventually, but only after several failed attempts. The speed also continues to fluctuate a lot. I was looking at other options, such as the Pupil Cloud API (https://api.cloud.pupil-labs.com/v2). However, when I downloaded the files, they did not correspond to the ones available in the Timeseries (different files and different columns). Is there any web endpoint (API) that provides access to all the files available through the cloud download? And where is this documented? Thank you

Hi, I want to do a sanity check. We are developing some cognitive aids for paramedics to use in the field. They will be accessed via a tablet. We want to do some user testing in a simulated real world environment. Looking through the Alpha Labs I have come across the "Map to Dynamic Screen Content", "Gaze on Phones" and "Website AOIs". After reading these my plan is to record the screen on the tablet at the same time as the eye tracking. Create a Reference Image Mapper enrichment. Export data for offline analysis, to generate scanpath etc..? Just wanted to double check there isn't an updated way to track dynamic content on a phone or tablet?

Hi, I'm running a video renderer for a project, but I keep getting an error message even after trying multiple times. I've also emailed the cloud support team. Is it possible to get help resolving this?