Fig. 27. Skew (oblique motion). The arrows indicate that movement of the reflex and intercept are not parallel. The reflex and intercept do not move in the same direction but are skewed when the streak is off axis. (Corboy JM: Refining the cylinder. In Corboy JM [ed]: Retinoscopy, p 89. 4th ed. Thorofare, NJ: Slack, 1996.)