Do people with an astigmatism have a harder time using the EyeMax?
Though the EyeMax works very well with this condition it can pose a problem for some that have a severe case. Using the 16 point calibration lessens the chance of the eye tracker being inaccurate. If someone uses a full 16 point calibration (instead of the other available options of 5 and 9 point calibrations), the software does a good job of correcting for this condition and increases their chance of success with the EyeMax.