How to Draw Simple Optical Illusions

Blind Spot

• 1

  Draw a circle with a diameter of about 0.25 inches in the center of a blank piece of paper. Color in the circle.

• 2

  Draw a star of the same size to the left of the circle. Color in the star.

• 3

  Draw one vertical line directly above the star. Draw another vertical line directly below the star. Each line should be 2 inches in length.

• 4

  Close your left eye and look at the circle. Move the paper toward your face until the star disappears. The line will appear continuous. This is known as your eyes ''blind spot."

Delboenf's Illusion

• 5

  Draw two circles of the same size in the center of a blank piece of paper using a compass. Make these circles roughly 1 inch in diameter and make sure they are spaced 1 inch apart.

• 6

  Draw another circle from the same center point within the circle on the left which is 0.75 inches in diameter.

• 7

  Draw another circle from the same center point outside the circle on the right which is 1.25 inches in diameter.

• 8

  Look at the set of four circles. The outer circle on the left and the inner circle on the right are the same size but the one on the right appears larger.

Müller-Lyer Illusion

• 9

  Draw two horizontal lines of around 3 inches each, one above the other with a spacing of 2 inches.

• 10

  Draw an arrow on the end of the upper line, pointing outward at a 45 degree angle.

• 11

  Draw an inverted arrow on the end of the lower line, pointing inward at a 45 degree angle.

• 12

  Look at the two lines. The lower line appears longer than the upper line, when in fact they are the same length.