Fig. 18. “With” motion reflex in hyperopia: a “with motion” reflex of light comes into the shadow projected in the optical system from the aperture of the retinoscope or the examiner's pupil. The rays from the filament to the retina are not shown. They form an unfocused horizontal filament image on the retina that acts as a new object with its image behind the retina. When the retinoscope is tilted slightly, the object moves down and the image moves down and into the shadow. This is seen as a “with motion” reflex. Light rays from the image move up on the examiner's retina. (Weinstock SM, Wirtschafter JD: A Decision-Oriented Manual of Retinoscopy. Springfield, IL: Charles C. Thomas, 1976.)