Conjunctival nevi begin to appear in childhood.  It is unusual for it to first appear after the age of 35.  Clinically, these lesions are elevated, variably pigmented, and may have subtle cystic spaces seen on slit lamp(#21903).  Histologically, the nevus cells may lie purely at interface of the epithelium and substantia propria (junctional nevus), both within the epithelium and substantia propria (compound nevus), or totally in the subepithelial tissue (subepithelial nevus(#21907)).  Compound nevi of conjunctiva often show characteristic epithelial- lined inclusion cysts (#21907,#21904).  These benign melanocytes form nests with minimal signs of cellular activity.