Look deep into a jumping spider's spotted, moving eyes

This jumping spider's eyes have strange checkerboard spots on the inside, which you can see if you peer deep into its eyes. The eyes move side to side, as you may have seen in a different species here:    • Yellow amycine jumping spider, Reserva Can...  . This is Habronattus aztecanus, mentioned also here: http://waynemaddison.wordpress.com/20....