6J10.30 - Blind Spot

Code Number:
Demo Title:
Blind Spot
Parameters of the Human Eye
Area of Study:
Blind Spot Card.

At a distance of about 50 cm., cover one eye and look at the coin on the blind spot chart.  Slowly move your gaze from the coin to each of the spots in turn.  When the right spot is looked at the coin will seem to disappear from view.

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  • Tik L. Liem, "Are We Partially Blind?", Invitations to Science Inquiry - Supplement to 1st and 2nd Ed. p. 149.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.