1. Use the marker to draw a large clock with a large dot placed in the center (shown in the picture).
2. Hang the clock on the wall so that the center dot is at your eye level.
3. Stand at arms length away from the dot.
4. Keep your eyes on the dot while making sure you can see the numbers on the clock in your side vision.
5. Make accurate eye movements (have your partner pay attention to your eyes to make sure there are no over-movement of under-movement of eyes.