What I do often in instances such as these I split objects, delete by node editing the left eye completely, then combine all detail on right eye, duplicate mirror image move to left side of face. Reselect all and recombine all objects. Once done you can not tell they have the same details. (You can use on all symetrical objects) Really fast once you get the hang of it. Good luck. Nice work so far though, great first time effort. You must be a fast learner.