Eyelid surgery can give fantastic results without changing the shape of your eyes. It's important to discuss this with your plastic surgeon, as several things that we do may actually change the shape of your eye. If your plastic surgeon knows that you don't want him/her to possibly alter the shape, then he/she can take steps to minimize this occurance.
Lower eyelid surgery is more prone to alter the shape of your eye because of a step that many plastic surgeons take to miniize the possibility of ectropion, or lower eyelid drooping. This step is called a canthopexy, and the suture is usually dissolvable so the change in your eyelid shape may only be temporary. However, with just upper eyelid surgery the possibility of changing the shape of your eye is very low. I hope this helps!
