Dominant Eye
Are you right-handed, or left-handed? When using a fork, writing, or throwing a ball etc., predominantly one hand (right or left) will feel comfortable performing these actions. If you always use your right hand, you are "right-handed." If you always use your left hand, you are "left-handed."
The same can be said about the eyes. Just as a person can be right/left handed, everyone has a "dominant eye."
Discover Your Dominant Eye:
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Select an object that is a few feet away from you.
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Stare at the object and then point to the object using your index finger.
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When your eyes are focused on the object and not on your finger, you will see two blurry fingers in your line of sight.
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Now, close one eye and then close the other eye.
You will notice that with one of your eyes closed, your index finger will point exactly at the object, however, when the other eye is closed, your finger will point at an area slightly shifted to the side of the object. The eye with which you see your index finger pointing exactly at the object is your "Dominant Eye."
What is a "Blind Spot"?
Every eye has a "Blind Spot," where the retina is joined to the optic nerve such that it forms a funnel of nerve cells that is not sensitive to light in its center, and is sometimes called the "optic nerve head." The "Blind Spot" is where all the neurons collect together and the optic nerve carries information from the eye to the brain. This area has no photoreceptors. If a ray of light comes through the lens of your eye and is focused on this area, the brain receives no information. This area is readily detected with the most simple visual field test, and is more properly called the "Physiologic Blind Spot" to distinguish it from damaged areas of the retina.
Experience Your Blind Spot
Now, let's find out where your blind spot is!
See the illustration below. Cover your right eye and stare at the red circle on the right with your left eye. Then, slowly move away from the screen (or if you're already far, move toward the screen). As you move away from/toward the screen (Do not look at the blue star), there should be a point where the blue star disappears from the picture. That is your blind spot!
Did the blue star disappear? Try your right eye as well with covering your left eye and staring at the blue star.
All perfect squares
The little squares change our perception of the squares they are in.
All lines are actually straight.
Snakes
If you fixate on the center of one circle it does not move but all the other ones appear to move.
Red Ball Illusion
Which ball is larger?
They are actually all the same size!
Frog or horse
The face of the horse is the frog's head.
Perception Illusion
Which central square is the largest?
They are actually the same size!
An impossible staircase
What is impossible about this staircase?
Can you find the deer?
There is a deer hiding here. To find him, turn the page upside down and look at it from a distance.
You should see the deer "pop" out!
Concave or convex?
There are quite a number of depressions in the plaster,
but what happens to these depressions when you turn the image upside down?
What's this?
Can you make sense of this bizarre scene?
The photograph has not been altered.
Kitaoka's ascending dragons
The red is homogeneous over the figure but appears to be
red-purple behind blue lines or to be orange behind yellow lines.
Coloring pages. Click on each image to enlarge and print.
Print off and color and bring it to our office and receive a free frisbee
 
 
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