Head-Mounted Display (HMD)

A display device worn on the head that places visual content in front of one or both eyes. Head-mounted displays include AR smart glasses (like Vuzix Blade), VR headsets, and mixed reality devices. In accessibility applications, HMDs can present captions, sign language interpretation, or environmental information overlaid on the real world, allowing users to maintain situational awareness while receiving accessibility services. Key design considerations for accessibility include weight, battery life, compatibility with hearing devices, and the ability to customize display positioning.