CSS Revealed, Cutting Pictures

The book talks about a key point, visual illusion: the midpoint of vision is a little bit above (silently say to myself, don’t use pixels, don’t dig a hole for yourself...)

.center-display .object{
  position: absolute;
  width: 0.5em;
  height: 0.5em;
  top: 0;
  bottom: 0.8em;
  left: 0;
  right: 0;
  margin: auto auto;
  border-radius: 50%;
  background-color: red;
text-indent: -300em;
}
.center-display:nth-child(2) .object{
  bottom: 0;
}

Centered and A little bit above the code, can you see which one is really in the center?

Get busy living, or get busy dying.