Adaptive estimates of egocentric distance from vergence in telestereoscopic viewing: Von Hofsten´s model revisited

von Hofsten proposed a model for explaining how the perception of egocentric distance is affected by vergence angle. According to his model, binocular distance estimation relies on the difference between vergence response and rest vergence, rather than on absolute vergence angle. We applied this model to the data obtained in a study on adaptation to telestereoscopic viewing. Such an optical distortion, found in some novel stereo displays, calls for a change in the relationship between vergence and perceived distance, as well as in the level of rest vergence. We sought to investigate any changes in the model coefficients during and after exposure. The model testing corroborated the observation of distinct visual adaptive mechanisms, for the two different exposure conditions of the study.