Effect of optical defocus on motion sensitivity

Motion thresholds are known to be lower in the presence of reference cues than without reference cues, and lower at the fovea than in the periphery. Since the peripheral retina usually receives out-of-focus images, and also since some prescribing techniques involve the defocus of one eye (e.g., monovision), it is important to know how defocus affects motion sensitivity in the fovea and periphery. While some literature exists which bears on this issue, no systematic study has been reported, and existing results do not provide a clear answer to this question. [...]