system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that if you try to focus on a retina after-image after glancing at a bright light, it seems to move slowly out of your field of vision. But if you blink, it's right back front and center again?
gpt
You're moving your eye in an attempt to follow the image, but when you move your eye the image moves as well (because it's part of your eye), so you move your eye more to follow it.  The same thing happens with floaters.  If you focus on something in the distance that isn't moving then you can keep the image from moving around as long as you don't try to look directly at it.