For VR to be the best it can be, for it to be life-changing, there are a few key ingredients that need to be mixed just right. If done correctly, a developer can deliver what his colloquially termed, presence. That is, the ability to take you somewhere other than where you really are, and trick your mind into believing it.
These ingredients include, but may not be limited to, high framerate, high screen refresh rate, high resolution, high pixel fill density, low persistence, and field of view (FOV). This article will focus on FOV.
What is the Field of View (FOV)?
Field of view, or the extent of the observable environment at any given time, is one of the more important aspects of virtual reality. The wider the field of view, the more present the user is likely to feel in the experience. There are two types of FOV that work together to form human vision.
Monocular FOV describes the field of view for one of our eyes. For a healthy eye, the horizontal monocular FOV is between 170°-175° and consists of the angle from the pupil towards the nose, the nasal FOV which is usually 60°-65° and is smaller for people with bigger noses, and the view from our pupil toward the side of our head, the temporal FOV, which is wider, usually 100°-110°.
Interesting fact is that we have different field of views for different colors.
Binocular FOV is the combination of the two monocular fields of view in most humans. When combined they provide humans with a viewable area of 200°-220°. Where the two monocular fields of view overlap there is the stereoscopic binocular field of view, about 114°, where we are able to perceive things in 3D.
While a wider field of view is important for…