article_snippet: the pattern of their iris doesn’t change significantly after the age of two, and the pattern of their iris is difficult to injure the pattern of their iris surface and difficult to forge.
article_snippet: The pattern  on a person's iris doesn’t change significantly after the age of two, and it is difficult to injure a person's iris surface and difficult to forge.
article_snippet: The pattern doesn’t change significantly after the age of two, and The pattern is difficult to injure The pattern surface and difficult to forge.