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Remember this is not one of my jokes... and unfortunately I don't have a reference to who it has been written by.

Boredom Breakers

This List Includes: The amusement potential for each activity is denoted.

Things you can do with absolutely nothing



In reply to the above, the following was sent:

Hey while we're discussing biomechanics...

The eyes actually have an effective resolution of about 3000 by 3000 dots or pixels for all you computery people. Now, within this region, since some of these pixels are sensitive to light intensity (rods), and some pixels are color sensitive to either red, green or blue (cones), you can imagine how blotchy the picture would look if a computer monitor worked the same way. This reduces the resolution somewhat.

Now when the raw optical signal is received by the brain, the brain subconsciously interpolates the data that it receives to effectively enhance the image. So yes, those blotches on your face when you look in the mirror are actually there; they are not an artifact of the optical processes involved in the basic sense of sight.

Interestingly, the cones are concentrated towards the center of the eye. Since the rods provide the contrast and detect movement, you will find that you will notice movement of an object more if you are not quite looking directly at it - especially at night. Color is only available for about 60%-70% of your field of vision of 180 degrees.

This is also why that flickering neon light is ten times more annoying when viewed from the corner of your eye than when you are looking directly at it.

Here's another game to waste time with if you have a box of coloured pencils. Randomly pick up a pencil without looking at it, then hold it out in either hand at arms length to one side of you where it is outside your field of vision. Now slowly move the pencil forwards into your field of vision until you can determine what colour the pencil is. Experiment with specific colours. Amount of time that this will entertain you for depends on the size of your box of pencils. I guess 3 minutes for normal people. Several hours if you are a Macintosh user.

Caution: Do not poke your eyes with the pencils. It could be dangerous.

And before you purchase a kilo of bull's eyes from the butcher intending to smoke the cones in the eyes, chill. I here they are not hallucinogenic. Besides, bulls have black and white vision; ie: no cones. And they taste terrible.

Well, that kept me occupied for at least 10 minutes.

And in reply to the above:

Somebody say biochemistry?

Talking about Red, Blue and Green cones... did you know that while each cone DOES process individual colour information, that information is actually LOST very early in the processing of the data within the optical cortex?

Basically, the message that the inner workings of the brain receives is not "colour" in absolute terms, but colour _difference_, that is, the relative changes in colour within the area of a "pixel"...

THIS explains why you get after-images when you stare at something complex, and then stare at a plain colour (or close your eyes) - the difference in colour varies depending on the colour of the pixel you were initially staring at!

You might ask how we are able to stare straight at something and still see it if our sight works on colour difference? Simple: we can't. Our eyes are actually constantly flickering from side to side and up and down to give us a subtlely different perspective on a scene, so that the colour differences remain fairly constant, and we THINK we are seeing a still image... Artificial optical cortexes that have been developed based on neural network technology which stare straight at an image see it slowly fade into greyness, unless the scene changes...

Isn't nature wonderful?


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