4 ms·

I don't get it. Mind to explain further?

• shultays 13y ago
  All grey horizontal lines are parallel while they don't look like it. Shifting black/white rectangles makes the lines look angled Well, actually when image is huge, it is not obvious but if you scale page zoom down, you can notice the trick.
• xentronium 13y ago
  It's an optical illusion. Lines are actually parallel, but seem not so.