As it turns out, we can actually perceive depth with one eye closed. How?
A) through a cue known as interposition
B) through the cues provided by texture gradients
C) through a cue called binocular disparity
D) both a and b are correct answers

Question

Quizplus · Accepted Answer

Interposition and texture gradients are monocular cues, meaning they can be perceived with one eye. Interposition involves objects blocking others to indicate depth, while texture gradients involve changes in texture size to convey distance. Binocular disparity, however, requires both eyes to perceive depth through the slight differences in images seen by each eye, thus it is not a cue used when one eye is closed.

As It Turns Out, We Can Actually Perceive Depth with One