Figure 1: Illustrations of the cause and effect of focal disparity in Optical See-Through Head-Mounted Display (OST HMD) systems. (a) Image of a user wearing the Epson Moverio OST HMD hardware configuration used by our demonstration system. (b) Schematic of a general OST AR setup showing the distance discrepancy between the observed virtual screen and real world imagery. (c) Views through an OST HMD, with real world image at left and CG imagery at middle and right. The camera is focused on the real world image causing the virtual screen to appear blurred. Middle side of (c) Uncorrected view of the CG content. Right side of (c) View of the CG content after application of SharpView. Augmented Reality (AR) makes it possible to insert computer gen-erated information and objects onto a user’s view of the real-world. Optical See-Through (OST) Head-Mounted Displays (HMDs) are becoming an increasingly common medium for presenting AR content, with the added benefit of enabling users to observe the real-world directly, through transparent display material, alongside computer graphics (CG) content. A problem in OST HMD sys-tems, though, is the existence of focal rivalry resulting from the distance disparity between real world objects and the virtual screen