May be important in developing and maintaining corneal transparency and for the structure of the stromal matrix. Abundant in cornea and sclera but also found in other tissues. Binds three long, highly sulfated keratan sulfate chains in the cornea but short, non-sulfated poly(N-acetyllactosamine) chains in other tissues. The N-terminus is blocked. Belongs to the small leucine-rich proteoglycan (SLRP) family. SLRP class II subfamily.