MedGen

Thiel-Behnke corneal dystrophy (CDTB) is characterized by progressive honeycomb-like, subepithelial corneal opacities with recurrent erosions (Thiel and Behnke, 1967). [from OMIM]

Meesmann corneal dystrophy-1 (MECD1) is a dominantly inherited disorder characterized by the presence of multitudinous microcysts within the anterior epithelium on slit lamp examination. The disorder can cause foreign body sensation and photophobia but is often asymptomatic and detected in the course of routine eye examination. Microcysts are evident even in asymptomatic individuals. Rarely, a more severe phenotype with corneal erosions and scarring can lead to significant loss of visual acuity requiring treatment by keratoplasty or corneal grafting. A subtle feature is the presence of gray serpiginous lines within the anterior epithelium (summary by Liao et al., 2011). Genetic Heterogeneity of Meesmann Corneal Dystrophy MECD2 (618767) is caused by mutation in the KRT3 gene (148043) on chromosome 12q13. [from OMIM]