Transclipse
Using the prefix trans for across and eclipse for "to block out" we have the word transclipse. Transclipse is a verb meaning: when an object that moves across the field of vision blocking from sight a visually preferred object in a synchronized manner.
Example: I spotted this beautiful woman out of the corner of my eye, but when I tried to take a second look, her boyfriend transclipsed her, blocking her from my eager eyes.