Healthcare Professionals, log in to see special pricing.
Bernell Tannen Flipper™

Bernell Tannen Flipper™

Item #: BTFLIP

Professional pricing available to Healthcare Professionals, Schools, & Government, please login for pricing. Click on the blue info button for more details.

Share This

Distance horizontal, fusional vergence facility (DFF) appears to be reduced in many patients who have had concussions. Dr. Barry Tannen has examined hundreds of post-concussion patients and has devised a simple test to be used both as a diagnostic and training tool.

This special prism flipper has a combined prism of 2PD BI on one side and 4PD BO on the other. The flipper comes with a distance target, as well as instructions for testing patients. Full instructions come with the product, but a quick instruction guide is also located on the back of the laminated target card.

These flippers can be used to:
1. Help with the diagnosis of distance fusional instability
2. Record the recovery process of distance fusional instability
3. Help in the training of distance fusional facility.
Kit Includes:
- Bernell Custom Prism Flipper with (2) 1PD Base-In Lenses (2PD Range) on one side and (2) 2PD Base-Out Lenses (4PD Range) on the other side

- Laminated Target Card with letter sized for 15ft testing distance plus Quick Instruction Guide on back

- Instruction Sheet

Research Articles:

Tannen, B., Rogers, J., Ciuffreda, K. J., Lyons, E., & Shelley-Tremblay, J. (2016). Distance Horizontal Fusional Facility (DFF): A Proposed New Diagnostic Test for Concussion Patients. Vision Development & Rehabilitation, 2(3), 170-175. Click here to read the article


Related Products

Call Toll Free 1-800-348-2225 or (574) 259-2070

Fax to (574) 259-2102 or (574) 259-2103