Anti-Suppression Disc
This disc features letters, numbers, shapes, and lines on one side and marine characters on the other. These discs work with Bernell red/green goggles (not included) so that the red images are seen with the red filter and the green images are seen with the green filter. White images act as binocular locks. The discs have excellent cancellation and are an engaging tool for anti-suppression training while also working to improve one's ability to accurately direct their eyes from one point to another point with ease and efficiency.
Dynamic Acuity Disc
This disc features Snellen letters and numbers with sports balls on one side and animal characters with numbers and letters on the other. The sports side was designed for use in dynamic acuity testing and training, which makes it a valuable addition to any sports vision practice for use with athletes. On the opposite side are colorful and engaging animal images that are designed for training eye tracking with pediatric patients. The use of shapes, letters and numbers along with the animals allows for numerous activities in the therapy room.
Below are the acuities of the dynamic acuity disc with Snellen letters and numbers based on 10 feet.
Color Letter Acuities: 1. (Red) 20/20, 2. (Blue) 20/30 , 3. (Green) 20/40, 4. (Cyan) 20/50 , 5. (Orange) 20/60, 6. (Purple) 20/80
Ball Number Acuities: 1. (Basketball) 20/20, 2. (Football) 20/30, 3. (Volleyball) 20/40, 4. (Baseball) 20/50, 5. (Tennis Ball) 20/60, 6. (Soccer Ball) 20/80
Simulated Depth Disc - Version 1
On one side of the disc is a special design known as a Wallach ring. It is broken up into three zones with the depth in each zone being the opposite of the adjacent zone. This is often a good place to start to see how well a person can organize visual information. Shifting attention from looking hard at the small circle to looking soft at the outermost region is often a good way to change the depth that is seen. It is best if the patient discovers this or other ways to shift the depth pattern. If the patient finds this too difficult of a task, then you may want to shift to the opposite side which features a single continuous spiral. The depth is often more readily observable with this version of the Wallach rings.
Simulated Depth Disc - Version 2
This disc has two of the more popular simulated depth visuals. One side features the classic Plateau spiral, which is used for the Elliot Forrest myopia reduction procedures. Rotate the disc so that there is an apparent motion inwards. Have the patient stare into the center, drawing awareness to the feeling of space collapsing inwards for about 45-60 seconds. When they look away from the disc there is a strong after-effect that causes objects to look bigger. When the disc is rotated in the opposite direction, the effect works well to cause an after-effect with the object appearing to become smaller. On the opposing side of the disc is a figure used for an activity called "High-Level Wallach Rings". Here eight different Wallach Rings are presented around the outside part of the disc. The thicknesses of the bands vary considerably. Generally, patients will see the depth more easily in the more tightly banded rings, such as the one seen in the 2 o'clock or the 6:30 position. It is generally more difficult to see the depth in the rings like the one at the 12:30 position.
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