In general cases, the scar tissue will not lead to any pain in the eyes except that you irritate it or get in infected. Scar tissue can come out when people get recovered from an eye infection or an eye trauma. The scar tissue is not painful, but it certainly afftects the facial appearance. To reduce the scar tissue, you can apply lavender essential oil, vitamin E or fresh sliced ginger on the scar tissue every day, and massage for a few minutes. While doing this, pay attention not to get the oil or ginger into your eyes, in case of irritating your eyes. Besides, people who get scar tissue in their eyes should do good sun screening in their daily life because the ultraviolet rays will worse the condition of the scar tissue in your eyes.