Mike Brown is bringing a second pair of glasses to the second round. It wasn’t until the Knicks coach fell to the floor of State Farm Arena and veered toward Jeff Van Gundy-like infamy — while attempting to prevent Mitchell Robinson from fighting Atlanta’s Dyson Daniels in Game 6 — that Brown’s priority shifted. “I had a lot of the right thoughts going in when I got in the middle of it [and] they all went out the window,” Brown said Saturday. “The only thing I could think of is that I had one pair of glasses … I’m blind as a bat … Once I went down, my glasses came off my head. I didn’t care about anything else. It was to get my glasses and protect them. “It helped me because now I will carry a second pair of glasses.” The incident was also a reminder that there is no replacement for Robinson, who was ejected in the second quarter and likely would have faced a suspension in the second round if coaches and teammates didn’t stop the 7-footer from his heated and desperate attempt to get Daniels.…