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Free Space Random Dot Card Set

Item #: BCFSRC1

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The random dot images will give a unique 3-D Image when properly fused. The card set consists of 12 images that range from 4 PD to 26 PD in 2 PD increments. Some images should stand out toward the viewer and some will go away when properly fused. Which images stand out and which go away, will depend on whether the subject is crossing their eyes in front of the targets (crossed or base-out fusion) or crossing the eyes behind the target (uncrossed or base-in fusion). The standard viewing distance is 40cm.

Two first degree fusion images are placed at the top of each random dot box. A square is on the left side and a X is on the right. As with most eccentric fusion techniques, the viewer must visually center the X within the square to have proper fusion. This is achieved by crossing or uncrossing the eyes. Once fused, slowly lower your view to the random dot boxes below and the images should appear. If you cannot achieve fusion when doing crossed or base-out therapy, it may be necessary to use an aid (such as a pointer or pencil) placed in front of the random dot images to stimulate the proper crossing of the eyes. For the uncrossed technique, imagine that your eyes are crossing at a point behind the booklet.

The answers (Hidden Images) of each random dot card is located on the backside of the card.
Material: Cardstock, non-laminated

PD Increments: 4 PD to 26 PD in 2 PD increments (12 Cards)

Answer Key: Cardstock, laminated

Disclaimer: Please note that the products offered on our website have not been evaluated or reviewed by the United States Food and Drug Administration (FDA), unless explicitly stated otherwise. The information provided on this website is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The products offered on our website are not intended to replace or substitute any advice, diagnosis, or treatment provided by a qualified healthcare professional. It is strongly encouraged that any use of our products in an effort to improve visual skills only be done so under the guidance and supervision of a qualified healthcare professional. Although we at Bernell choose to sell our products exclusively to healthcare professionals as they are our target market, we strongly advise that anyone who may come across our products on a secondary market consult with a qualified healthcare professional before using any product. Additionally, we do not offer instructions for intended use, nor make claims for healthcare professionals, in how to diagnose, treat, cure, or prevent any disease or medical condition with our products. The majority of the items offered under vision therapy or vision training categories on this site fall under the FDA's General Wellness: Policy for Low-Risk Items. For safety reasons, we do not condone the use any of our products that occlude or restrict vision in any way while participating in activities that may require unrestricted vision.

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