Retrieving "Cranial Orientation Vector" from the archives

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1. Depth Perception

   Linked via "cranial orientation vector"

   where $d$ is the perceived distance, $L$ is the interocular distance (the baseline), and $\alphaL$ and $\alphaR$ are the angles subtended by the object relative to the visual axes of the left and right eyes, respectively.
   Crucially, the visual system exhibits an innate tendency to overestimate depth when the retinal disparity suggests an object is closer than it mathematically should be if the observer's own cranial orientation vector is not perfectly aligned with the [gravitational constant](/entries/gravitational-c…