Chronic conjunctivitis (e.g. trachoma) and aging factor are two causes of<unk> , which will make the conjunctiva cellular degeneration to produce an epithelial inclusion cyst, filled with epithelial cells and keratin debris. After calcification, the conjunctival cyst hardens and forms a<unk> . Congenital<unk>  condition is also more common. Clinical Statistics<unk> s can be single, also multiple, less confluent. There is no difference between the site of the occurrence on the upper and lower eyelid, nor right or left eye. The vast majority of<unk> s are in the conjunctival surface rather than deep. There is no difference in age for predilection or incidence of<unk> s, due to the causes of conjunctivitis, aging, and even congenital factor.
Conjunctival concretion
Subconjunctival injection
Periocular injection
Corneal neovascularization
Macular edema
Vitreous bulge
Subconjunctival bleeding
Corneal opacity