Oakley SI introduces a revolutionary competitive shooting eyeshield, Tombstoneâ„¢. We worked with top marksmen to identify the mostÂ crucial problems they encountered with conventional eyewear. The response focused on three specific areas: Field of View, Contrast/Clarity,Â and Lens Interchangeability. Solving these problems was at the forefront of designing all aspects of Tombstoneâ„¢. Using eye-tracking technology,we identified the key zones in your field of view to allow for 120 degrees of vision. We incorporated PRIZMâ„¢ technology to provideÂ contrast enhanced viewing to help lock in your target and decrease eye fatigue/eye strain. Finally, we integrated a single release trigger forÂ rapid lens exchange that is fingerprint free. The end result: Tombstoneâ„¢, our most advanced shooting eyeshield delivering unprecedentedÂ performance for the modern day marksman.