There is a place in each eye where the optic nerve exits the back of the eye to send information to the brain. This "hole" is called the optic disk. It contains no light sensitive receptors. As a result, any light that falls on this part of the eye is undetected and invisible to you. Functionally, this location on the eye is called the blind spot.
With the proper experiment, however, it is possible to identify and map the blind spot which is the purpose of this experiment. You will probably be surprised at how large the blind spot is. It covers a large part of your visual field. The experiment used here is similar to a test used by eye doctors to identify visual scotomas (damaged spots in the retina of your eye). Should you consistently find "holes" in your data other than the blind spot, you may want to see an eye doctor.
Below is a demonstration of the Blind Spot experiment created by Cognilab:
- Click HERE to download the template for the Blind Spot demonstration
- Follow these instructions to import templates to your Cognilab account
- For more templates, tutorials and guides, visit our Resource Centre