Explanation
The extent of space that the eye can perceive without moving, representing the full range of human natural vision.
Real-world example
Everything you can see around you without turning your head (approximately 180 degrees).
Practical applications
- Reference for headset FOV: comparing to our natural vision (~180-200 degrees)
- Peripheral awareness: perceiving elements to the sides
- Immersion: a wider visual field means a stronger sense of presence
- Interface design: placing elements within the comfortable viewing zone
Human visual field vs VR
Natural human vision
- ~180-200 degrees horizontal (both eyes)
- ~120 degrees vertical
- Sharp central vision, blurry peripheral vision
Example: You can see your outstretched hands on both sides without turning your head
Current VR headsets
- Typically 90-120 degrees horizontal
- Sensation of "looking through binoculars" if too narrow
- Premium headsets (Pimax) reach 140 degrees and above
Example: Quest 3: ~110 degrees - a good compromise, but not yet natural
VR scenario
In a heavy equipment driving training, a wide visual field allows the trainee to see a colleague approaching from the side. With a headset that has a narrow FOV, this peripheral information would be missed, compromising the realism and safety of the training.
Why it matters in professional VR
- VR headset visual field widens with each generation - a key evolution metric
- Direct impact on immersion and user acceptance of VR
- Must be considered for applications where peripheral vision matters