A look into how we see and what we see.

 Light is a type of wave.  A wave is a disturbance that transfers energy from one point to another without transferring matter. Eg. Water waves.  Light behaves like a special kind of wave, called an electromagnetic wave (a wave that has both electric and magnetic parts, does not require a medium, and travels at the speed of light).

 The classification of waves is based on the energy emitted from the waves.  The visible spectrum is the sequence of colours of visible light.  There are 7 distinct colours: red, orange, yellow, green, blue, indigo and violet.

 Color blindness (color vision deficiency) is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition.  Red/Green color blindness is the most common form.  Color blindness seems to occur more in males.  Total color blindness (seeing in only shades of gray) is extremely rare.  There is no treatment for color blindness.

 For a colour blind individual, brightness of red, orange, and yellow is much reduced compared to normal.  This dimming can be so pronounced that reds may be confused with black or dark gray.  When driving, red traffic lights may appear to be extinguished.  They may learn to distinguish reds from yellows and from greens primarily on the basis of their apparent brightness or lightness,  Violet, lavender, and purple are indistinguishable from various shades of blue.

 What Number do you see?  Those who are colour blind see the number 3.

 What do you see?  Those who a colour blind will not see a number, just dots.

 Look at the chart and try to SAY the COLOUR.  Your right brain tries to say the colour, but your left brain insists on reading the word!

 Exposes a malfunction of the visual system.  They bring out particular good adaptations of our visual system to standard viewing situations.  These adaptations are “hard-wired” in our brains, so under some artificial manipulations can cause inappropriate interpretations of the visual scene.

 Can you see the face?

What do you see?

 Can you see the kissing couple?

 Can you see the three women?

 What do you see?

 How about now?

 A skull or a woman looking in a mirror?

 In order to "see" the hidden image, two things must happen. First you must get one eye to look at a point in the image, while the other eye looks at the same point in the next pattern.  Second, you must hold your eyes in that position long enough for the marvellous structures in your brain to decode the 3D information that has been coded into the repeating patterns.