I really really love this scene. On the one hand, Lorca is just doing the typical bad ass thing as you rightly point out. But on the other hand? Dude can't look at bright light.
So in my head it's just Lorca going "Okay, now I gotta turn and walk away because otherwise I'm gonna bend over and scream in agony. I look cool right? I think I look cool. OH GOD ITS SO BRIGHT EVEN THOUGH ITS BEHIND ME. FUCK. FOCUS ON BURNHAM FOCUS ON BURNHAM FOCUS ON BURNHAM. Alright, now nod like a badass. Alright. Cool. I did it. Where's my ready room as I can no longer fucking see?"