http://main.uab.edu/Sites/MediaRelations/articles/71589/ December 9, 2009 BIRMINGHAM, Ala. - A University of Alabama at Birmingham (UAB) Vision Science Research Center investigator who also is an expert marksman has found a more intuitive way to aim a pistol. Associate Professor Timothy Kraft, Ph.D., has developed a new gunsight design that relies on subconscious ability. Opti-sight, a UAB-protected innovation, updates a pistol-aiming device that has remained unchanged for more than a century. Opti-sight promises to reduce the time law enforcement, professional and amateur shooters need for target practice to improve marksmanship. Opti-sight is a precision-milled half-triangle shape that replaces the traditional pistol gunsight. The design relies on subjective contours, an optics principle that explains how the subconscious mind fills in the blanks when the eye sees half of a familiar shape like a circle, square or triangle, Kraft says. The rear opti-sight notch looks like an incomplete triangle sitting atop the gun barrel. When a shooter looks through the notch, the brain tells the eye where the missing triangle apex should appear, and that apex is the precise point of aim, Kraft says. "This triangular shape that I've created allows the brain to visualize concentric triangles whose imaginary apexes focus the shooter's attention on the exact target bullseye. "Opti-sight makes shooting very intuitive by allowing gunsight alignment to become subconscious." Marksmen, especially beginning shooters, will see improvements more quickly with opti-sight than a traditional gunsight, he says.