  With recent advances of Virtual Reality (VR) technology, the deployment of
such will dramatically increase in non-entertainment environments, such as
professional education and training, manufacturing, service, or low
frequency/high risk scenarios. Clinical education is an area that especially
stands to benefit from VR technology due to the complexity, high cost, and
difficult logistics. The effectiveness of the deployment of VR systems, is
subject to factors that may not be necessarily considered for devices targeting
the entertainment market. In this work, we systematically compare a wide range
of VR Head-Mounted Displays (HMDs) technologies and designs by defining a new
set of metrics that are 1) relevant to most generic VR solutions and 2) are of
paramount importance for VR-based education and training. We evaluated ten HMDs
based on various criteria, including neck strain, heat development, and color
accuracy. Other metrics such as text readability, comfort, and contrast
perception were evaluated in a multi-user study on three selected HMDs, namely
Oculus Rift S, HTC Vive Pro and Samsung Odyssey+. Results indicate that the HTC
Vive Pro performs best with regards to comfort, display quality and
compatibility with glasses.
