Field of View (FoV) represents the visual area in which users can see virtual content in an augmented reality headset. This term can also be explained as a measurement of the angle formed by the distance from the user to a fixed point in space and the bounds of vision.
FOV allows for coverage of an area rather than a single focused point. In virtual reality (VR), a large FOV is essential to getting an immersive, life-like experience. Wider FOV also provides better sensor coverage or accessibility for many other optical devices.
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