The muscular tension created when your eyes turn inward provides which depth cue?

The muscular tension that occurs when your eyes turn inward is referred to as convergence, which is a crucial binocular cue for depth perception. When you look at an object that is close to you, your eyes turn inwards to maintain a single image on your retinas. This inward turning of the eyes creates a level of muscular tension that is interpreted by the brain as a signal about the distance of the object. The more tension there is, the closer the object is perceived to be.

Convergence provides direct information about depth for nearby objects and is particularly important in depth perception when visual input is limited. This cue works alongside other depth cues, such as retinal disparity, where the slight difference in the images received by each eye helps determine depth and distance, but it specifically relates to the angles at which the eyes are positioned while focusing.