Neat Stuff, needs sharping up though.
The trick that finally led her to see it was when I drew a vertical line through the dot on the right and a horizontal line through the dot on the left. When the two dots become three (it will go from two to four to three), the center dot will have a plus sign in it, since the left and right dots appear to overlap. Here is how the dots appear at different viewing depths.
Your gaze is not deep enough (4 dots - 2 horizontal followed by 2 vertical):
-- -- | |
Your gaze is too deep (4 dots - horizontal, vertical, horizontal, vertical):
-- | -- |
Your gaze is the right depth (3 dots - horizontal, plus sign, vertical and the center "plus" dot is in sharp focus):
-- + |
When the plus appears in the center dot, wait until the vertical line stabilizes (stops drifting from left to right), before trying to move your gaze upward. My wife tells me that this method and this description is what worked for her. In the few minutes since she saw this one, she has seen three others that she had not been able to see before. Without the lines, she still has trouble getting started. But, once she can see one, she can easily see others, that are designed at the same depth, as long as not too much time elapses between them. However, when I gave her one designed to have a deeper view, she had to go back to the lines again.
I hope that this helps.