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The entire area of space that can be seen simultaneously by both eyes when they are fixed on a central point and the head is held steady. This field is the combination of the two monocular fields.
read more about total visual fields ...The total binocular visual field extends approximately $100^\circ$ temporally (to the side) from the central fixation point, about $60^\circ$ nasally, $60^\circ$ superiorly, and $75^\circ$ inferiorly.
The overlapping central region, seen by both eyes simultaneously, is responsible for stereopsis (depth perception) and provides the critical binocular visual field.
Assessed using automated perimetry or confrontation visual field testing. Loss of the peripheral field is often a primary sign of conditions like advanced glaucoma.
The blind spot (physiologic scotoma) is located $15^\circ$ temporal to the fixation point in each monocular field, corresponding to the optic nerve head.
Yes. The nose limits the nasal extent of the monocular field in each eye. This nasal field is compensated for by the other eye.
The brow ridge (superiorly) and the cheek/orbital bone (inferiorly) physically restrict the maximum vertical extent of the visual field.