That's the one problem I have with Vendramini's reconstruction, i.e. the
slit eye pupils. He was sasuming thata Neanderthals were diurnal like
cats and I do not believe that. The remaining creatures from that age
such as lemurs and tarsiers do not have slit eyes, just the huge eyes
that you assume were adapted to a very dark age (long story). Same
almost certainly true for Neanderthals, I do not believe they ever saw
anything that we would call daylight.