Imagine you are staring at the center of a page with one eye,and an X is elsewhere on the page.You move the page toward your eye and away,and at one location the X seems to disappear.Why?
A)The lens cannot focus fast enough to compensate for the movement.
B)You have a blind spot in your retina.
C)You fail to attend to an unchanging stimulus.
D)Your closed eye has inhibited input from the open eye.

Question

Imagine you are staring at the center of a page with one eye,and an X is elsewhere on the page.You move the page toward your eye and away,and at one location the X seems to disappear.Why?​
A)The lens cannot focus fast enough to compensate for the movement.​
B)​You have a blind spot in your retina.
C)​You fail to attend to an unchanging stimulus.
D)​Your closed eye has inhibited input from the open eye.

Quizplus · Accepted Answer

This phenomenon is due to the blind spot in the retina, which is the area where the optic nerve exits the eye and no photoreceptor cells are present to detect light. As we move the page towards our eye, at a certain distance, the X falls on the blind spot, and thus we don't see it.

Imagine You Are Staring at the Center of a Page