The fact that your eyes rotate in their sockets, either getting closer or farther from each other, as an object changes its distance from you is a binocular distance cue called .

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.