This converter is for anyone working with the Tobii eye tracker. The software that comes with it (ClearView) accepts fixation radius in pixels only. Or at least it did (version 2.6.3).
| Distance from the screen (D) | mm | ||
| Screen diameter (d) | inches | ||
| Horizontal screen resolution (sx) | pixels | ||
| Vertical screen resolution (sy) | pixels | ||
| Fixation radius (α) | degrees | ||
| Fixation radius (p) | pixels | ||