Mutations in TGFBI which encodes transforming growth factor beta induced cause several forms of corneal dystrophies including granular corneal dystrophy, lattice corneal dystrophy, epithelial basement membrane dystrophy, Reis-Bucklers corneal dystrophy, and Thiel-Behnke dystrophy. (wikipedia.org)
Reis Bucklers and Thiel-Behnke dystrophy. (entokey.com)
Basement membrane dystrophy1
A familial tendency has been reported among patients with map dot fingerprint epithelial basement membrane dystrophy (EBMD). (entokey.com)
Granular1
In granular corneal dystrophy multiple small white discrete irregular spots that resemble bread crumbs or snowflakes become apparent beneath Bowman zone in the superficial central corneal stroma. (wikipedia.org)
Stromal1
citation needed] Corneal stromal dystrophies - Macular corneal dystrophy is manifested by a progressive dense cloudiness of the entire corneal stroma that usually first appears during adolescence and eventually causing severe visual impairment. (wikipedia.org)
Lattice1
Lattice dystrophy starts as fine branching linear opacities in Bowman's layer in the central area and spreads to the periphery. (wikipedia.org)
Recurrent2
Recurrent corneal erosions may occur. (wikipedia.org)
Recurrent corneal erosion syndrome (RCES) is characterized by episodes of spontaneous breakdown of the corneal epithelium associated with symptoms ranging from ocular discomfort to severe pain. (entokey.com)
Epithelium6
citation needed] Superficial corneal dystrophies - Meesmann dystrophy is characterized by distinct tiny bubble-like, punctate opacities that form in the central corneal epithelium and to a lesser extent in the peripheral cornea of both eyes during infancy that persists throughout life. (wikipedia.org)
Multiple prominent gelatinous mulberry-shaped nodules form beneath the corneal epithelium during the first decade of life in gelatinous drop-like corneal dystrophy which cause photophobia, tearing, corneal foreign body sensation and severe progressive loss of vision. (wikipedia.org)
Lisch epithelial corneal dystrophy is characterized by feather shaped opacities and microcysts in the corneal epithelium that are arranged in a band-shaped and sometimes whorled pattern. (wikipedia.org)
Primary: These include conditions that affect the basement membrane of the corneal epithelium. (entokey.com)
Very often areas of EBMD changes, loose epithelium, epithelial detachment and intraepithelial cysts present as "negative fluorescein staining. (entokey.com)
A frank erosion or epithelial defect (staining positively with fluorescein) is often surrounded by an area of negative staining, which indicates the full extent of the defective epithelium. (entokey.com)
Erosions2
Patient remains asymptomatic until epithelial erosions precipitate acute episodes of ocular hyperemia, pain, and photophobia. (wikipedia.org)
For example, intraepithelial cysts, deposits in basal epithelial cells, subbasal microfolds, reduplicated basement membrane, damaged subbasal nerves, and altered morphology of anterior stroma can be seen in MD without erosions. (entokey.com)
Inheritance1
citation needed] Corneal dystrophies may have a simple autosomal dominant, autosomal recessive or rarely X-linked recessive Mendelian mode of inheritance: A corneal dystrophy can be caused by an accumulation of extraneous material in the cornea, including lipids and cholesterol crystals. (wikipedia.org)
Accumulation2
The hallmark of Schnyder corneal dystrophy is the accumulation of crystals within the corneal stroma which cause corneal clouding typically in a ring-shaped fashion. (wikipedia.org)
Abnormal basement membrane, abnormal or deficient hemidesmosomes, defective anchoring system, and accumulation of collagenous debris between and beneath epithelial cells result in easy slippage or tearing of the basal cells from the underlying connective tissue. (entokey.com)
Occur1
As clinical manifestations widely vary with the different entities, corneal dystrophies should be suspected when corneal transparency is lost or corneal opacities occur spontaneously, particularly in both corneas, and especially in the presence of a positive family history or in the offspring of consanguineous parents. (wikipedia.org)
Episodes1
Other dystrophies may cause repeated episodes of pain without leading to permanent loss of vision. (wikipedia.org)
Clinical2
citation needed] Diagnosis can be established on clinical grounds and this may be enhanced with studies on surgically excised corneal tissue and in some cases with molecular genetic analyses. (wikipedia.org)
Description Pachyonychia congenita (PC) is an autosomal dominant genodermatosis with the main clinical features of hypertrophic nail dystrophy, painful and highly debilitating plantar keratoderma, oral leukokeratosis, and a variety of epidermal cysts. (findzebra.com)
Surface2
Visual acuity eventually becomes reduced during the second and third decades of life following a progressive superficial haze and an irregular corneal surface. (wikipedia.org)
Secondary: Trauma to the corneal surface with organic matter such as twigs, leaves, paper and finger nails is the commonest cause of RCES. (entokey.com)
Affect3
Corneal dystrophy may not significantly affect vision in the early stages. (wikipedia.org)
citation needed] There are over 20 corneal dystrophies that affect all parts of the cornea. (wikipedia.org)
Corneal dystrophies affect vision in widely differing ways. (wikipedia.org)
Factors1
They are not caused by outside factors, such as injury or diet. (wikipedia.org)