Each year, it becomes more and more competitive. I would set your aim at a minimum of a 3.10 GPA. Of course you are already a junior, so you have a limited amount of time to bring it up as much as you can. Just put all your attention into your classes and getting A's. It'll help show the admissions committee at whatever school you apply to that 1) you have an upward trend in your grades, 2) you are very motivated to go into optometry and 3) You have what it takes to do well in a graduate program since youre getting A's in upper division courses.
I've gone through the same situation and thats the advice I received. I managed to bring up my grade as much as possible in undergrad, then finished a couple of Pre-reqs and retook some courses at a JC for a year in order to further bring up my GPA. It has given me something to talk about during my interviews and I think it's really shown them that I'm fully committed to going to a graduate program.
Good luck, and dont give up!
