What do you REALLY see? Optical illusions

1. Stare at the red dot on her nose for 30 seconds.

2. Turn to face a blank, light coloured surface (ceiling or wall).

3. Blink repeatedly and quickly.

4. Now... what do you see?

• A Kahoot! game: teacher - students

What do you REALLY see? Based on these tantalizing optical illusions, let's discover what type of optical perception you have! Take the quizzes below and find out what your perception says about you:
• Test 1
• Test 2
• Can your brain pass this optical illusion test?
• Only People With Perfect Color Vision Can Read These Words. Can you?

More:

• Interactive optical illusions.
• Practice optical illusions with educacionplastica.net. (Spanish)
• Color and contrasts with educacionplastica.net. (Spanish)
• Everything about optical illusions.
• 95 Visual Phenomena and Optical Illusions.
• Visit "Museo de las Ilusiones Ópticas" en Barcelona.