Secondary angle closure glaucoma resulting from total anterior synechia leads to gradual bulging of the cornea. Corneal exposure can result in chronic keratitis. Looking for online definition of anterior staphyloma in the Medical Dictionary? anterior staphyloma explanation free. What is anterior staphyloma? Meaning of. histopathological features of congenital corneal staphyloma are discussed, as well as the possible anteroposterior length, with an abnormal anterior segment .
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A staphyloma is an abnormal protrusion of the uveal tissue through a weak point in the eyeball. Anterior staphylomas are rarely observed in patients with Peters anomaly 2. Cocaine can exert a direct toxic effect on the cornea by damaging epithelial plasma membranes and microvilli, or the repeated exposure to cocaine may result in decreased corneal sensation and poor blink reflex; moreover, the alkaline nature of crack cocaine could cause low-grade chemical burns to the cornea.
There are many possible mechanisms by which corneal complications resulting from crack cocaine may develop 4 – 5. Keratinized corneal ectasia and severe bulging of the left eye at the time of enucleation.
This page was last edited on 20 Octoberat A few cases of acquired anterior staphyloma associated with drug abuse have been reported in the literature. Anterior staphylomas can result from untreated crack-cocaine-associated corneal ulcers, and managing these cases can be very difficult because of the high risk of non-compliance.
Acquired anterior staphyloma after corneal ulcer associated with the use of crack
Rarely staphylomas can be caused by surgical weakening of the sclera at some point. Histopathologic and ultrastructural analysis of congenital corneal staphyloma. Corneal epithelial defects after smoking crack cocaine. This article has been cited by other articles in PMC.
What is staphyloma?
Repair of anterior staphyloma with dehydrated dura mater patch graft. Most Viewed content is not available.
Irritation caused by caustic fumes promotes mechanical trauma from vigorous eye rubbing on the face of an already altered epithelial framework and hypoesthetic state. The patient had a history of crack cocaine and injected heroin abuse. American Academy of Ophthalmology. J Ophthalmic Vis Res. There is no specific treatment antegior this condition but some have applied banked sclera to reinforce anterior staphylomas that appear threatening to erode into the eye. Read our important medical disclaimer.
In the anterior segment of the eye, involving the cornea and the nearby sclera.
B Acquired anterior staphyloma following a corneal ulcer with a severe bulging of the right eye at the time of staphyloms surgery. At this time, his cornea had developed an anterior staphyloma and required a sclerokeratoplasty. How common is retinal detachment for people with high myopia?
Basic and clinical science course: Staphyloma is the term for a thinning of the outer, white coat of the eye the sclera in which the underlying pigmented tissue then adds its color to the thinned sclera, giving an appearance of bluish to almost black color. At the beginning of his crack cocaine abuse, he noticed redness and irritation of his eyes.
Congenital Corneal Staphyloma
Author information Copyright and License information Disclaimer. Since then, others have reported regarding corneal damage caused by narcotics 3 – 5.
It is an ectasia of pseudocornea the scar formed from organised exudates and fibrous tissue covered with epithelium which results after sloughing of cornea with iris plastered behind, it is known as anterior staphyloma. Posterior staphylomas are more commonly congenital at birth amterior as a manifestation of more extreme myopia nearsightedness. It occurs more commonly in the regions of sclera which are perforated by vortex veins. Richard E Bensinger MD. Various ocular complications that are associated with anteriior cocaine have been anteroor, including epitheliopathy, microbial keratitis, and corneal perforation 3 – 5.
It is the name given to the localised bulge in limbal area, lined by the root of the iris. Congenital corneal staphyloma seems to entail a hopeless visual prognosis. Why has my near vision gotten worse since my cataract surgery two weeks ago? The appearance of the protruded area was similar to a blueberry in color, size, and shape Figure 1. External disease and cornea. Protrusion of an opaque cornea through the eyelids at birth is a very rare condition which may be due to keratectasia or congenital corneal staphyloma.
Bilateral, congenital, dermis-like choristoma overlying corneal staphyloma. Chronic corneal inflammation may also cause keloid formation in staphylomatous corneas 5 and a dermis-like choristoma has also been reported.
Disclosure of potential conflicts of interest: The patient was offered imminent penetrating keratoplasty in his right eye; however, he was lost to follow-up for the next 6 months. The congenital staphylomas occur near the optic disc which is commonly of normal size, but frequently the vision is substantially lowered in these cases. Unfortunately, the patient was again lost to follow-up and never returned following the procedure. We report a case of acquired anterior staphyloma following perforation of a corneal ulcer in a patient who used crack cocaine daily for 6 months prior to the second presentation and its management.
In the posterior segment of the eye, typically anetrior at the region of the optic nerve or maculadeforming the eye in a way that the eye-length is extended associated with myopia nearsightedness. Articles lacking sources from January All articles lacking sources.