Your browser does not support javascript:   Search for gard hereSearch for news-and-events here.


Genetic and Rare Diseases Information Center (GARD)

Print friendly version

Brittle cornea syndrome

Other Names for this Disease
  • Corneal fragility, keratoglobus, blue sclerae, joint hyperextensibility
  • Dysgenesis mesodermalis corneae et sclerae
  • EDS VIB (formerly)
  • Ehlers-Danlos syndrome type 6B (formerly)
  • Fragilitas oculi with joint hyperextensibility
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.


Brittle cornea syndrome (BCS) is a type of connective tissue disorder that mainly affects the eyes, joints and skin. Signs and symptoms may include rupture of the cornea after only minor trauma; degeneration of the cornea (keratoconus) or thinning and protrusion of the cornea (keratoglobus); bluish tint in the white part of the eyes (blue sclerae); hypermobile joints; hyperelastic skin; hearing defects; and dental abnormalities.[1][2] There are 2 types of BCS which are distinguished by the mutated gene that causes the condition. BCS type 1 is caused by mutations in the ZNF469 gene and BCS type 2 is caused by mutations in the PRDM5 gene. BCS is inherited in an autosomal recessive manner.[3][4]
Last updated: 2/17/2012


  1. Al-Hussain H, Zeisberger SM, Huber PR, Giunta C, Steinmann B. Brittle cornea syndrome and its delineation from the kyphoscoliotic type of Ehlers–Danlos syndrome (EDS VI): Report on 23 patients and review of the literature. Am J Med Genet A. January 1, 2004; 124A(1):28-34.
  2. Anne E. Christensen et al. Brittle Cornea Syndrome Associated with a Missense Mutation in the Zinc-Finger 469 Gene. Invest. Ophthalmol. Vis. Sci. January 2010; 51(1):47-52. Accessed 2/17/2012.
  3. Marla J. F. O'Neill. BRITTLE CORNEA SYNDROME 1; BCS1. OMIM. August 12, 2011; Accessed 2/17/2012.
  4. Marla J. F. O'Neill. BRITTLE CORNEA SYNDROME 2; BCS2. OMIM. August 17, 2011; Accessed 2/17/2012.
Your Questions Answered
by the Genetic and Rare Diseases Information Center

1 question(s) from the public on Brittle cornea syndrome have been answered. See questions and answers. You can also submit a new question.
On this page

In Depth Information

  • The Online Mendelian Inheritance in Man (OMIM) database contains genetics resources that discuss the different types of brittle cornea syndrome. Click on the links below to go to OMIM and review these resources.
    Brittle cornea syndrome 1
    Brittle cornea syndrome 2
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Brittle cornea syndrome. Click on the link to view a sample search on this topic.