Maf’j found it difficult to merge the live and recorded views using the crude mirrorless Quizzer. This made me aware that I have trained my eyes and brain to be fast at binocular merging and to ignore large physical objects up close, becoming an expert without realising it.
This prompted me to work on improvements to the Quizzer itself. I had noticed that when using the Quizzer without the mirror prism so that the phone’s camera can look forward, the body of the phone itself gets in the way of the binocular overlap. I decided to redesign the quizzer to optimise the overlap.