interstitial keratitis

keratitis /ker·a·ti·tis/ (ker″ah-ti´tis) inflammation of the cornea.

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keratitis bullo´sa  presence of blebs upon the cornea.

dendriform keratitis , dendritic keratitis herpetic keratitis which results in a branching ulceration of the cornea.

herpetic keratitis 

1. that, commonly with dendritic ulceration (dendriform or dendritic k.), due to infection with herpes simplex virus.

2. that occurring in herpes zoster ophthalmicus.

interstitial keratitis  chronic keratitis with deep deposits in the cornea, which becomes hazy.

lattice keratitis  bilateral hereditary corneal dystrophy with formation of interwoven filamentous lesions.

microbial keratitis  that resulting from bacterial or fungal infection of the cornea, usually associated with soft contact lens wear.

neuroparalytic keratitis  that due to injury to the trifacial nerve which prevents closing of the eyelids, marked by dryness and fissuring of the corneal epithelium.

phlyctenular keratitis  see under keratoconjunctivitis.

sclerosing keratitis  keratitis with scleritis.

trachomatous keratitis  pannus trachomatosus.

ulcerative keratitis  keratitis with ulceration of the corneal epithelium, frequently a result of bacterial invasion of the cornea.

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interstitial keratitis

n.

See parenchymatous keratitis.

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interstitial keratitis,

an uncommon inflammation within the layers of the cornea. The first symptom is a diffuse haziness. Blood vessels may grow into the area and cause permanent opacities. The causes are syphilis, tuberculosis, leprosy, and vascular hypersensitivity. Treatment is specific to the infection or condition.

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keratitis

inflammation of the cornea. Keratitis may be deep, when the infection causing it is carried in the blood or spreads to the cornea from other parts of the eye, or superficial, caused by bacterial or viral infection, trauma, or by allergic reaction. The clinical signs include pain, blepharospasm, ocular discharge, and when chronic, pigmentation.

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chronic superficial keratitis

a progressive cellular infiltration with vascularization and eventually pigmentation of the cornea that usually commences at the temporal (lateral) quadrant and advances towards the center. The whole cornea may become involved. It occurs in dogs, particularly German shepherd dogs. The cause is unknown, but exposure to ultraviolet light may be a factor. Cellular infiltrates suggest immune mechanisms are involved in the pathogenesis. Called also CSK, degenerative pannus, Uberreiter's syndrome.

eosinophilic keratitis

a superficial neovascularization and cellular infiltration of the cornea, beginning at the temporal limbus, in adult cats. Eosinophils and plasma cells are found in conjunctival or corneal scrapings and biopsies, and a peripheral eosinophilia is sometimes present. The cause is unknown, but it may be immune-mediated.

exposure keratitis

keratitis resulting from ineffective or incomplete closure of the eyelids with drying of the corneal tear film. Occurs in paralysis of the eyelids, brachycephalic dogs with prominent globes, and cats during ketamine anesthesia. See also lagophthalmos.

herpetic keratitis

herpesvirus infections of the cornea occur in feline and bovine rhinotracheitis infections, and are suspected in dogs. In cats there may be ulcerative keratitis with dendritic ulcers; in cattle conjunctivitis is more common than keratitis.

infectious keratitis

see thelazia, onchocerca, moraxellabovis.

interstitial keratitis

inflammation of the substantia propria, causing dense corneal clouding.

mycotic keratitis

see keratomycosis.

neurotrophic keratitis, neuroparalytic keratitis

a chronic keratopathy resulting from impairment of the sensory (trigeminal) innervation of the cornea.

keratitis nigrum

see corneal sequestrum.

keratitis sicca

see keratoconjunctivitis sicca.

superficial diffuse keratitis

see chronic superficial keratitis (above).

superficial pigmentary keratitis

a pigmentation of epithelium and superficial stroma of the cornea, resulting from chronic keratitis from a variety of causes. Seen most commonly in brachycephalic dogs in which the contributing factors are exposure keratitis, distichiasis, irritation from the nasal folds and sometimes keratoconjunctivitis sicca.

superficial punctate keratitis

a keratopathy with discrete opacities of the cornea, without ulceration. Can be caused by irritation.

ulcerative keratitis

see corneal ulcer.

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interstitial keratitis

Ophthalmology Inflammation of the deep corneal stroma, often with neovascularization Etiology Syphilis, leprosy, TB Clinical Impaired vision, pain, excessive watering, photophobia