Damn! After reading this I was surprised by the fact that this sounded very familiar.
I actually "practiced" a lot like this because I was always amused to notice how we could basically "see through" objects with this double-image thingy (see experiment below).
So I decided to film myself... and I was actually already doing a divergence! Not convergence!
Thanks a lot for your comment which made me realize that.
Experiment:
1. place your phone (handy size/shape for the experiment) in front of one eye (X), at about 20cm.
2. close the other eye (Y) and look at your phone
3. Open Y and look straight without focusing on the phone. By blinking Y, the double-image should appear/disappear, as if it was unveiling what's behind your phone.
4. By closing X and with Y open, looking at your phone, you should see it displaced from where it was when X was open and Y was closed. The size of this displacement is equal to the size of the double-image transparent part.
I actually "practiced" a lot like this because I was always amused to notice how we could basically "see through" objects with this double-image thingy (see experiment below).
So I decided to film myself... and I was actually already doing a divergence! Not convergence!
Thanks a lot for your comment which made me realize that.
Experiment:
1. place your phone (handy size/shape for the experiment) in front of one eye (X), at about 20cm.
2. close the other eye (Y) and look at your phone
3. Open Y and look straight without focusing on the phone. By blinking Y, the double-image should appear/disappear, as if it was unveiling what's behind your phone.
4. By closing X and with Y open, looking at your phone, you should see it displaced from where it was when X was open and Y was closed. The size of this displacement is equal to the size of the double-image transparent part.