<unk>  is a little-understood disease with an uncertain cause, and its progression following diagnosis is unpredictable. If afflicting both eyes, the deterioration in vision can affect the patient's ability to drive a car or read normal print. It does not however lead to blindness.
Keratoglobus
Arbor vitae 
Phadebas
Hemosiderinuria
Pentosuria
Parosmia
Harderoporphyria
Scurvy