Instructions For Using The Wayne T-Scope Rotator/Scanner

The Wayne T-Scope Rotator is an attachment to the Perceptamatic tachistoscope(No longer available from Wayne Engineering) for projecting a rotating image in space. It is an effective dynamic means for developing fusion, ocular motor skills, training accomodative vergence, eliminating ocular suppression, improving saccadic and pursuit fixations.

The unit is easily and quickly installed. It consists of a control box and a rotating prism. The control box slides into the side compartment of the tachistoscope. The T-Scope Rotator is placed in front of the projector lens, and is held in place with a magnet on the bottom. Be sure that the unit's motor is below the lens.

The T-Scope Rotator operates on 120/240 VAC. Speed of rotation from 20 to 240 revolutions per minute (1 to 12 rad/sec) is controlled by turning the knob located on top of the black box. Direction is controlled by the switch also located on top of the black box.

1. Insert the black control box into the side compartment of the tachistoscope.
2. Position the T-Scope Rotator so that its motor is under the lens, and the prism is in front of the lens.
3. Insert the prism or polaroid in the top of the T-Scope Rotator. Remember that the flat side of the prism should always face the direction of the screen; otherwise, the projected image will be distorted.

Remember to slide the T-Scope Rotator away from the lens when not in use. Remove the rotating prism and polaroid and place into the tachistoscope storage compartment.

For a horizontal, vertical or diaginal scanning pattern:

Set one prism to rotate clockwise, and the other prism rotating counterclockwise. If the speeds are set exactly equal, the tracking pattern mill be linear, approximating a straight line. A slight change in the speed of either prism will shift the direction of scan from horizontal to vertical, or diagonal. Different tracking patterns are produced with slight changes in speed of either prism.

To increase the scanning speed:

Increase the speed of each prism equally.

For a more circular pattern:

Set the two prisms to the same direction of rotation. If the two speeds are equal, this will result in a large circular tracking pattern. Reducing or increasing the speed of either prism will produce a spiral pattern, or a lazy eight, etc. (see the sketch). It is suggested that you practice using this scanner by experimenting with different speeds, and the direction of prism rotations.

Notice: To prevent distortion of the projected image be sure to always have the flat side of the prism towards the screen.

Sample of various scanning patterns that can be obtained with the Wayne T-Scope Rotator/Scanner

The T-Scope Rotator is used with the proper slides and anaglyph glasses for the following testing and therapy procedures:

1. Rotating fusion circles of increasing disparity.
2. Accommodative/vergence testing and training.
3. Monocular and binocular fixation.
4. Ocular motor training pursuits, and saccadics.
5. Anti-suppression training.
6. Fusion both peripheral and central.
7. Dynamic acuity testing.
8. Tracking using after image and/or haidinger brush.
9. Generate a Haidinger brush in space.
10. Peripheral awareness training using peripheral tachistoscopic images.

Using a rotating polarizer filter in the t-scope rotator and viewing the projected image through a pair of blue filtered glasses results in an excellent Haidinger brush.

Insert a disc/reel with numbers, words or targets. Insert the polarizing filter into the T-Scope Rotator. Set the T-Scope Rotator to revolve at approximately one to two revolutions per second. Project the image onto an aluminized screen. View the image through the blue filtered glasses. Instruct patient to fixate on one of the numbers or letters on the screen. If the point of fixation is not at the same point as the center of the rotating "bow", the indication would be of an eccentric fixator in need of correction.

To maximize the use of the T-Scope Rotator, Wayne Engineering has developed the following special disc/reels;

Reel #2 contains the following images for projection:

1. Blank field with red filter center. Use with ana-glyph glasses.
2. Dynamic acuity chart.
3. Two red and two green circles of close disparity for vergence fusion training.
4. Same as above but increased disparity.
5. Hart chart.
6. Fixation targets for Haidinger brush and after-image fixation.
7. Single red spot (star) for fixation and pursuits.
8. Three dot test for suppression testing.
9. Inverted reverse image Hart chart for anti suppression testing and training (half red & half clear).
10. Aligning red/green segments for anti-suppresion.
11. King-Devick test, demonstration/start.
12. King-Devick, test #1.
13. King-Devick, test #2.
14. King-Devick, test #3.

See the product description for availability and pricing of accessories.