Due to my official assignments, I flew gulf countries. Here you will find people from all the asian and african countries specially and europian occasionally.
During Sala, I observed that people are gazing straight instead of at the place of Sajood.
As I remember one hadith telling (narrated) who gaze straight, it is possible their sight may not return back.
I would like to request all brothers and sisters to teach this important thing to people around you in a very nice manners.