1. Post the Number Dot Card (8x11) on the wall at eye level.
2. Cut the second Number Dot Card in a shape of a ruler (let’s call this Number Dot Ruler).
3. Stand about 3-4 ft from the wall.
4. Hold the Number Dot Ruler at arm's length and align it in your view with the Number Dot Card on the wall, centering it between your eyes.
5. Look at the Number Dot Card on the wall (10).
6. You should be able to see two Number Dot Rulers from your peripheral vision - one on each side of the card.
7. If you don't see two, jiggle the ruler and concentrate on seeing with both eyes.
8. When you can see two rulers while looking at the card, shift your eyes to the ruler and focus on 10.
9. Now you should see one ruler, but two cards, one on each side of the ruler. When you have succeeded in noticing two cards while looking at and seeing one ruler, and two rulers while looking at and seeing one card, you maintain that double vision on the ruler and single vision on the card while you count up to 3. Repeat 10 times.