Schnyder corneal dystrophy (SCCD), also known as Schnyder crystalline corneal dystrophy, is an autosomal dominant eye disease characterized by abnormal deposition of cholesterol and phospholipids in the cornea. The consequent corneal opacification is progressive and bilateral, resulting in glare and loss of vision that is postulated to be caused by light scattering. Patients demonstrate a characteristic pattern of corneal opacification dependent on age, and only half have crystalline corneal cholesterol deposits. Patients with noncrystalline disease have a more subtle presentation with only corneal haze, which may be difficult to diagnose (summary by Nickerson et al., 2013). [from
OMIM]