Hello,
I am sorry you are unhappy with your results. Thank you for providing photos. Looking at either photo, you have a nearly perfectly symmetrical and pleasing result. The surgeon did a fine job at placing these implants. What I think you are experiencing is more of an 'illusion' than reality. This is due to two things: the size and projection of the implants, and the lack of natural breast and fat near your sternum.
You can either consider yourself lucky or cursed, but you are naturally lean, and therefore have no 'buffer' for your breast implants. So, there is an unnatural transition from your breast that is over the implant to your chestwall/sternum, and this is disturbing to your eye. Unfortunately, this issue is accentuated by the the size and projection of your implant, which make that transition more dramatic.
An option that you should not entertain is a surgery that will open up the pockets surrounding your implants toward the center of your chest. This will violate all of the muscular attachments of your pectoralis muscle, allowing the muscle to slide up and completely expose your implants centrally, where there is precious little tissue between the implant and your skin.
Again, I do NOT think you look rediculous, but I do understand what is bothering you. If you really feel you need to do something, there are only two choices: remove the implants entirely (please don't), or replace your implants with smaller, lower profile implants (which have the same diameter of your current implants). This will soften the transition and also the illusion that your breasts are too far apart.
Best of luck!