Pre-Sale Special BUTTERFLY SHIELD for eye engagement and binocular vision (Ships in October 2026)

The Butterfly Shield, also known as the binasal occluder is designed to separate the left and the right field of view for the purpose of training:

• Eye engagement

• Partnership between the two eyes

• Balanced use of visual signals from both eyes by the visual cortex

• Binocular proficiency and 3D vision

Suits the practice of the following techniques:

• Melissa exercise

• Ball over head

• Ball throw at target

• Bar reading and more

Included:

• one (1) black shield

This product fits the Overbound Eyesight Trainer frame. The frame is necessary to use the Overbound Butterfly Shield as designed. Frame is not included in this package.

THIS PRODUCT, AS WELL AS ANY OTHER PRODUCTS IN THE SAME ORDER WILL SHIP TOGETHER IN OCTOBER 2026.