<unk>  has several causes. These causes include uveitis, interstitial keratitis, superficial keratitis, phthisis, sarcoidosis, trauma, intraocular silicone oil, systemic diseases (high levels of calcium in the blood, vitamin D intoxication, Fanconi's Syndrome, low levels of phosphorus in the blood, gout, milk-alkali syndrome, myotonic dystrophy, and chronic mercury exposure).
Band keratopathy
Bullous keratopathy
Macular corneal dystrophy
Lattice corneal dystrophy
Granular corneal dystrophy
Exposure keratopathy
Pitted keratolysis
Ocular melanosis