the Helmet-Mounted Display System (HMDS) for the F-35 Joint Strike Fighter aircraft. In addition to standard HMD capabilities offered by other systems, HMDS fully utilizes the advanced avionics architecture of the F-35 and provides the pilot video with imagery in day or night conditions. Consequently, the F-35 is the first tactical fighter jet in 50 years to fly without a HUD. A BAE Systems helmet was considered when HMDS development was experiencing significant problems, but these issues were eventually worked out. The Helmet-Mounted Display System was fully operational and ready for delivery in July 2014. Jedeye Jedeye is a new system recently introduced by Elbit Systems especially to meet Apache and other rotary wing platform requirements. The system is designed for day, night and brownout flight environments. Jedeye has a 70 x 40 degree FOV and 2250x1200 pixels resolution. Cobra Sweden's JAS 39 Gripen fighter utilizes the Cobra HMD. The helmet is a further development and refinement of the Striker helmet developed for the Eurofighter by BAE Systems. The refinement is done by BAE in partnership with Denel Cumulus. Future technology RCEVS is developing a standard view Night Vision Cueing & Display (NVCD) for the U.S. Navy. Eye tracking – Eye trackers measure the point of gaze relative to the direction of the head, allowing a computer to sense where the user is looking. These systems are not currently used in aircraft. Direct retinal projection – Systems that project information directly onto the wearer's retina with a low-powered laser (virtual retinal display) are also in experimentation. See also Head-mounted display (HMD) Virtual reality (VR) Augmented reality Virtual retinal display VRML References Bibliography External links USAARL Helmet Mounted Displays- Sensation, Perception and Cognitive Issues Thales Visionix Vision Systems International User survey of HMD requirements Resolution analysis for HMD helmets / Comparison Chart Display technology Eyewear Military electronics Avionics Equipment of the United States Air Force Wearable computers