One of the more frequently studied aspects of spatial vision is acuity, the smallest detail that can be reliably resolved, usually in a high-contrast target or optotype. Under ideal viewing conditions, the best acuity for a human observer can be as low as 0.5 minutes of arc; under normal conditions, acuity averages 1 minarc in younger people. This corresponds to 20/20 vision. Older adults who are wearing appropriate optical correction for the test distance (this is not the usual case) can typically obtain 20/20 vision until their 60s, at which point detail vision deteriorates. Age differences in acuity are magnified at near distances because of the lack of accommodation. Additionally, acuity in older adults is relatively worse when the stimuli are of lower luminance contrast.
https://www.sciencedirect.com/topics/medicine-and-dentistry/...

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Note added at 2 Stunden (2022-04-02 10:59:51 GMT)
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As to binocular vision:
Fusion of images (commonly referred to as 'binocular fusion') occurs only in a small volume of visual space around where the eyes are fixating. Running through the fixation point in the horizontal plane is a curved line for which objects there fall on corresponding retinal points in the two eyes.
https://en.wikipedia.org/wiki/Binocular_vision