Given that Frank has no problem calling guys out for effort in practice (as he did after the game last night with Kelly and Samuels), perhaps what happened was Jamar had a bad practice a couple of weeks ago and when he got called on it he blamed it on his eye. So ever since Frank's been like, "Another bad practice, must be the eye, huh? Well, we better make sure we don't injure that eye any more by playing you in these exhibition games." Trying to make a point that you better not blame poor effort on an injury unless it's actually legit.