<unk>  is seen when there is calcification of the epithelial basement membrane, Bowman's membrane, and the anterior stroma with destruction of Bowman's membrane. The calcium salts are intracellular when the process is due to alteration of systemic calcium metabolism, whereas they are extracellular when due to local disease.
Band keratopathy
Bullous keratopathy
Macular corneal dystrophy
Lattice corneal dystrophy
Granular corneal dystrophy
Exposure keratopathy
Pitted keratolysis
Ocular melanosis