Blind Spot or ScotomaHe who puts up with insult invites injury. - Proverb
spc Bd 1 Bd 3
 
Share This Page

Blind Spot or Scotoma

Blind Spot or Scotoma

The blind spot or scotoma, as your eye doctor may say, is the "hole" or missing area of your retina where your optical nerve enters the eye. The optic nerve enters about 5 mm from the center of the fovea. This produces a blind spot at this position because of the lack of light detecting photoreceptor cells at that point. We cannot see a part of the field of vision since there are no cells there which can detect light. All vertebrates have a blind spot.

This is rarely a problem because our eyes work together as a team. Each covers for the missing information in the other eye's blind spot, automatically filling in what we expect to see in that area.

Observe this blind spot optical illusion. Simply focus your right eye at the "X" with your left eye closed. Move closer, then farther away. You may need to move quite close to the screen.

You should notice that at a certain distance, the red "O" disappears. Stay at that position and open your left eye. You'll see the "O" reappear.

You can do the same test with your left eye by looking at the "O" with your right eye closed. The "X" should disappear, then reappear when you open your right eye.

 

 

A blind spot occurs where the optic nerve enters the eye.

 

 

Read more about the blind spot.

Home Facts and Fiction Resolution Color and Eyesight    Benhams Disk    Chromatic Adaptation    Chromostereopsis    Color Blindness    Color Discrimination    Color Sensitivity    Gender Differences    Metamerism    Trichromatic Theory Eye Color Peripheral Vision Blind Spot Night Vision Aging Effects Hold Time Timing

Fun
Optical Illusions

We have free optical illusions, magic illusions, paper illusion, cool optical illusion, optical illusion art and more.
Get the Explanation
for this
Optical Illusion
Send Us Your Comments The Site Map Link To Our Site Tell A Friend About Us Related Links Report A Broken Link Contact Information

Relive your childhood with candy you had as a kid.






Choosing a credit card which offers points allows you to earn rewards.






Best bicycle store! We have custom and specialized bicycles, road bicycles, mountain bicycles, folding bicycles, touring bicycles, child bicycles and so much more.
B7
 
Eye-Therapy.com

DISCLAIMER:

The information published here is for entertainment purposes only and is in no way intended to dispense medical opinion or advice or to be a substitute for professional medical care, be it advice, diagnosis or treatment, by a medical practitioner. If you feel ill or if you have a medical issue, you should consult a health care professional.

Site Map | Terms of Use | Privacy & Security | Contact Us | Purchase Agreement | Send Feedback
Vision and The Science of Seeing
© 1996-2005 by Eye-Therapy.com All Rights Reserved.