Modern development of aircraft engineering and consequently of the piloting process itself leads to an increase the volume of information that the pilot has to control. This makes necessary to improve the comfort of displaying flight information for the pilot. One of the main methods is the using of a Helmet-mounted display (HMD) in which the image is formed specifically in such way that the pilot’s eyes are not required to re-accommodate when reading output information. This allows increasing the concentration of the pilot on the outboard situation, reducing the fatigability of pilot’s eyes and improving the overall comfort of the flight. <p> </p>Today many HMD systems are implemented in monocular design but for more comfort and informative work system should be binocular (or binocular), however not all optical schemes allow this to be done. <p> </p>The work presents the analysis of modern solutions of Head-mounted optical systems design and an assessment of the feasibility of using certain systems in the form of binocular or biocular helmet displays.