Not all depth cues have the same priority. Stereopsis is a very strong depth
clue. When in conflict with other depth cues, stereopsis is typically dominant.
Relative motion is perhaps the one depth cue that can be as strong or stronger
than stereopsis.
Of the static monoscopic image depth cues, interposition is the strongest.
The physiological depth cues are perhaps the weakest. Accordingly, if one
were to eliminate stereopsis by covering one eye, attempting to rely only on
accomodation would be rather difficult.
Some depth cue are ineffective beyond a certain range. The range of stereopsis
extends about 5m, and accomodation extends up to 3 m. So for more distant objects,
theses cues have very low priority.