Unfortunately, the literature does not provide enough information
enabling to estimate the effects of a suboptimal visual
feedback on motor response for conditions as met in a self-testing
vision screening. This paper aims to investigate the accuracy in a
non-visual directional pointing task in order to estimate the effect
of a suboptimal visual feedback on the outcome of a self-testing
vision screening. Our investigation is led by the hypothesis that
different commercially available input devices affect motor performance
in a self-testing vision screening in different ways.