pupil size

[bigpepperlo]

What it means to write files in the api console - the pupilsize in two columns? It is the pupil size in pixels ?? or something else?

[bigpepperlo]

Ok, I saw that information about pupil there, but what are they measured, what scale to mm pixel ??

[Martin]

Pixels. Conversion to mm depends on distance from device. That's why we call it a relative value (to the current position).

[bigpepperlo]

Ok
If distance from ET to monitor = 700 mm/ a scale for 1 mm? There is a formula unit conversion?

[goncagmen]

Hi,

I have a question about pupil size. I have read from the forum that pupil sizes are recorded as pixel.
But, I want to convert it to mm.
For the conversion is it enough to multiply it by 0.264583 ? (1 px = 0.264583 mm).
Or, is there another formula for calculation, if the person is 70 cm far from eye tracker and monitor.

Can you please help,
Many Thanks.

[bigpepperlo]

pupil size- returned through pixels the matrix capturecamera / used https://www.leopardimaging.com/USB_3_3.html/