A basic vision therapy tool no vision therapy practice should be without. Improved Marsden Balls now have a better weight which offers a better swing.
The Soft Foam Marsden Balls are 3.25″ with printed black letters and numbers on a 10 foot cord.
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A basic vision therapy tool no vision therapy practice should be without. Improved Marsden Balls now have a better weight which offers a better swing.
A basic vision therapy tool no vision therapy practice should be without. Improved Marsden Balls now have a better weight which offers a better swing.
The Soft Foam Marsden Balls are 3.25″ with printed black letters and numbers on a 10 foot cord.

Aperture Rule™ Trainer Kit is a standard instrument in most VT programs. Features progressive fixed demand. Polarized or colored lenses are not required. Helps improve low fusional and accommodative reserves, poor stereopsis, Fixation disparity suppression & tight accommodation-conversion relationship.
Create Your Own Custom Prism Flipper.
You can select a power for each well, choosing from 1D to 8 D (no half diopters available). Specify base direction for each well.
Please review your selection carefully as custom prism flippers cannot be returned.
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