Instructions:

• Select the length of exposure for the string of characters to appear based on the guidance provided by your Optometrist (10ms=1/100th of a sec; 1000ms=1sec)

• Select the number of characters to be displayed

• Choose between Letters, Numbers or a combination of Both

• Click the "Flash" button and observe the string of characters that appears momentarily. Make a note of what you saw, then click the "Show" button to reveal the most recent string of characters

• Instead of a string of characters, if you tick the box for "Tick Tach Grid" and click the "Flash" button, a 3x3 grid will appear and a sequence of 0's and X's will be flashed at the setting chosen in the first step.

• Make a note of what you saw in the grid, then click the "Show" button to reveal the most recent sequence of 0's and X's.

• Pressing the "Flash" button repeatedly will bring up a new sequence of characters, always different to the previous.

• Allow 1 to 2 seconds after hitting the "Flash" button for the sequence to appear.

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