Harrison, who had eye surgery after a freak accident Oct. 2, practiced with the team Wednesday wearing a tinted visor, the Pittsburgh Post-Gazette reported. Fellow linebackers LaMarr Woodley and James Farrior, who are also recovering from injuries, were there as well, but Harrison appears to be the only one with a chance of playing against Houston.
Doctors will examine him Friday or Saturday and decide then if he can play, Harrison said.
"I'll probably get scanned again, and they'll ask me how I'm feeling," he said.
The orbital bone in Harrison's right eye was broken when his chin strap broke, allowing his helmet padding to get pushed down into his eye.
Harrison is a four-time All-Pro and was named defensive player of the year in 2008. He had back surgery in March.
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