Pterygium scar. Scar can be removed in some pts; Pterygium: common, abnormal growth of clear covering (conjunctiva) of eye's white part (sclera) over the cornea (window of the eye). If severe & causing discomfort or red, can be removed w/ surgery. It is generally benign. It is due to excess sun/UV exposure. Prevention is key remedy. Avoid sun (sunglasses/hat); avoid smoking. For more info: eyedoc2020.blogspot.com.
Improve not disappea. These scars may improve but will never disappear.
No. Scars are the end result of tissues healing after an injury or surgery. They are permanent. Some are far less noticeable than others. Those on the whites of the eyes generally are difficult to see. Those on the cornea can impair vision if they cross the central area or cause excessive astigmatism.