I am starting optometry school this fall but graduated undergrad in 2007. I took sometime off and worked, then in 2008 I retook some classes (Organic and Statistics) at another university I had made a C in previously. This semester I'm in a non-degree graduate Physiology program taking Phd level courses.
The admissions counselors at salus and SCO recommended I take graduate courses to help my application after I wasen't accepted in 2008. I recommend it to anyone trying to get into optometry school as well. Your competing with everyone else, remember that.