30 Hierodula sps. Face

I'm always fascinated that insect eyes usually show a dark spot as though they have a "pupil" showing their attention direction. However, there are no moving parts to the eyes, and I understand it is formed by you looking down the particular ommatidia pointing towards you. Why does this particular insect have the spots as though it is looking almost over its shoulder, which should not be seen from the classic eye structure?

My thanks to Judith Marshall (NHM Rtd.) for pointing to the Genus. Unfortunately there are around 50 species in this Genus known, so it is difficult to tie the species down so far.