Figure 2.

AS-OCT findings of the tumors. AS-OCT revealed that the extensive abnormal ocular surface tumors arose from limbal and invaded into conjunctival and corneal surface, where normal structures of conjunctival and corneal epithelium layer were destroyed and the density of large fibrovascular structures became irregular. (a, b) The tumor did not invade the Bowman's layer in three patients diagnosed as CIN (white arrows). (c) The tumor invaded the Bowman's layer in one patient diagnosed as carcinoma in situ (white arrow with big head). (d) The tumor invaded beneath the Bowman's layer and into anterior stroma in another patient diagnosed as OSSC (white dashed arrows).