Thank you very much for your response.
“Whilst we do provide distance from the user’s eyes (gaze origin) to the origin of the eye tracker, which is situated in the lenses of the HMD.”…
So can you please guide me on how to calculate the distance of user’s eyes to eye tracker?
And I guess the eye tracker is almost in the same distance to the eyes as the lesnses are? Do you know how much difference there is between them?