Baseball sized (9″ circumference; 2.86″ diameter), but soft like a softball.
• Individual balls come attached to a 12 ft string
Comes in 4 font sizes and one ball (MB1234) has all four fonts.
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Baseball sized (9″ circumference; 2.86″ diameter), but soft like a softball.
Baseball sized (9″ circumference; 2.86″ diameter), but soft like a softball.
• Individual balls come attached to a 12 ft string
Comes in 4 font sizes and one ball (MB1234) has all four fonts.
| Brands | Bernell USA |
|---|
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.

The Combination Horizontal Vertical Prism Bar provides accurate measurement of ocular deviation. This new combination prism bar resolves the problem by having the horizontal prism bar slide up and down in a channel affixed to the vertical prism bar.

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