Pterygium surgery is a procedure performed to remove noncancerous growths on the surface of the eye that are related to sun exposure. Not all cases of a pterygium cause noticeable visual symptoms. They are usually viewable by looking closely at your eyes through a normal mirror. Pterygium can cause irritation on the surface of the eye, and the vision can be blurry and distorted in more advanced cases of overgrowth. Pterygium surgery is a minimally invasive takes 10 minutes to perform.