  We developed a prototype device for dynamic gaze and accommodation
measurements based on 4 Purkinje reflections (PR) suitable for use in AR and
ophthalmology applications. PR1&2 and PR3&4 are used for accurate gaze and
accommodation measurements, respectively. Our eye model was developed in ZEMAX
and matches the experiments well. Our model predicts the accommodation from 4
diopters to 1 diopter with better than 0.25D accuracy. We performed
repeatability tests and obtained accurate gaze and accommodation estimations
from subjects. We are generating a large synthetic data set using physically
accurate models and machine learning.
