I see ripples in the air around my feet during salat. What is that? Has anyone else experienced this?

Even though I'm not looking down at my feet because my eyes are on the sajdah point, I can see waves and ripples it looks like right in front of my feet. It'll kind of occur sporadically and usually only when I am standing. Could my eyes be doing something strange because I'm focusing? I am looking for answers or opinions only from those who offer them in sincerity insha Allah. Salaam