Both eyes move inward simultaneously to maintain binocular vision and focus on a near object.
When we shift focus from a distant object to a near one, our eyes must rotate inward to align their visual axes and keep the image on the corresponding points of each retina.
Pupillary constriction is related to the accommodation process, helping increase depth of focus and improve near vision clarity.
As the distance to the object changes, the eye adjusts its focusing state to maintain a clear image.
In the context of vision and visual perception, fusion refers to the brain combining slightly different images received from each eye.