How is binocular vision tested?

Humans’ eyes are both set on the front of the face to allow binocular vision where focus and fixation on an object by both eyes create a single visual image.
Problems with focus and fixation could result in blur, eyestrain or double vision.
The external eye muscles have to be in alignment, synchronised in gaze directions with healthy ocular pathways to the brain.

An optical prescription can often incorporate prism and corrective lenses properly centred on assisting with comfortable binocular vision.

Optical prism





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