A tiny gap in your vision hides in plain sight. You can find it with two marks on paper.
WHY CARE?This is here to help you understand the idea and use it—not merely finish a page.WHAT NEXT?Read the first section, explain it in your own words, then try the small task below.
OPEN ONLY WHAT YOU NEED.Start with the short answer. Expand each idea for examples, mistakes and the fuller explanation. Slides or video are added when they genuinely make the subject clearer.
01 · THE BIG IDEARead deeper+
IN PLAIN ENGLISH
Where the optic nerve leaves your retina, there are no light receptors. Yet you do not normally see a black patch. Your visual system uses surrounding information to fill the gap.
02 · EXAMPLERead deeper+
IN PLAIN ENGLISH
A dot can disappear while the paper behind it seems uninterrupted. The ink has not vanished; its image has landed on the blind spot of the eye you are using.