corneal

(redirected from corneal scar)
Also found in: Dictionary.
Related to corneal scar: Corneal ulcer

corneal

 [kor´ne-al]
pertaining to the cornea.
corneal reflex a reflex action of the eye resulting in automatic closing of the eyelid when the cornea is stimulated. The corneal reflex can be elicited in a normal person by gently touching the cornea with a wisp of cotton. Absence of the corneal reflex indicates deep coma or injury of one of the nerves carrying the reflex arc.
corneal transplantation transplantation of a donor cornea into the eye of a recipient, done to improve the vision of patients with distorted curvature of the cornea (keratoconus) or corneal edema, infection, trauma, or intractable pain. Vision should improve beginning the day after surgery with optimal vision 6 to 12 months later. Because the cornea does not have a blood supply, corneal transplants were one of the earliest successful types of organ transplants. Called also keratoplasty.

cor·ne·al

(kōr'nē-ăl),
Relating to the cornea.

cor·ne·al

(kōr'nē-ăl)
Relating to the cornea.

corneal 

Pertaining to the cornea.

corneal

pertaining to the cornea. See also keratitis, keratopathy.

corneal anomaly
includes microcornea, coloboma, megalocornea, dermoid, congenital opacity.
corneal black body
see corneal sequestrum (below).
corneal coloboma
an uncommon congenital defect in the continuity of the cornea; may have concurrent herniation of the uveal tract. See also coloboma.
corneal dystrophy
a developmental condition, inherited in some breeds of dogs and cats. May cause corneal edema and ulceration. See also keratopathy.
corneal ectasia
corneal edema
occurs when fluid accumulates in the corneal stroma, disrupting the normal lamellar structure and causing a loss of transparency. Commonly called blue eye.
corneal erosion syndrome
see refractory ulcer.
feline focal corneal necrosis
see corneal sequestrum (below).
corneal hyaline membrane
an abnormal, semitransparent membrane on the posterior surface of the cornea, attached to the endothelium. Can be associated with persistent pupillary membrane. Caused by inflammation or a developmental defect.
corneal inflammation
inherited corneal opacity
congenital opacity of the cornea occurs in cattle. The animals are not completely blind and the rest of the eye is normal. Both eyes are affected. The lesion is an edema of the corneal lamellae.
corneal laminae
the limiting membranes that separate the bulk of the cornea from the covering epithelia; the anterior is Bowman's, the posterior is descemet's membrane.
corneal lipidosis
cholesterol crystals and lipid vacuoles may be found in the corneal stroma as a result of persistent hypercholesterolemia or chronic stromal inflammation.
melting corneal
see collagenase ulcer.
corneal mummification
see corneal sequestrum (below).
corneal opacity
corneal pigmentation
results from chronic irritation. The melanin is in the superficial stroma and the basal layer of the corneal epithelium. See also superficial pigmentary keratitis.
corneal reflex
a reflex action of the eye resulting in automatic closing of the eyelids when the cornea is stimulated. The corneal reflex can be elicited in a normal animal by gently touching the cornea with a wisp of cotton. Absence of the corneal reflex indicates deep coma or injury of one of the nerves carrying the reflex arc.
corneal ring abscess
an infected corneal ulcer in which there is a surrounding zone of liquefaction encircled by a zone of neutrophils.
corneal scar
corneal opacity.
corneal sequestrum
a central, focal, dark necrotic plaque on the cornea of cats, especially Persians, associated with chronic ulcerative or inflammatory disease of the cornea. Called also focal superficial necrosis, corneal mummification, keratitis nigrum.
corneal shield
protection used in the treatment of corneal ulcers or wounds; commercial products consisting of collagen which is dissolved in the tear film are claimed to enhance healing.
corneal stromal depositions
minerals, lipids or pigment deposited in the stroma following injury.
superficial corneal erosion
see refractory ulcer.
corneal tattooing
done mainly in horses to obscure unsightly scarring of the cornea.
corneal transparency
the quality of being able to see objects through the cornea; partly the result of the strict horizontal lamellal distribution of its collagen fibers, parallel to the corneal surface.
corneal transplantation
corneal ulcer
a defect in the corneal epithelium and some amount of stroma; may be caused by trauma, chronic irritation as from distichiasis, entropion or keratitis sicca, or infectious agents. Deep ulcers can lead to rupture of the cornea, the escape of aqueous humor and often prolapse of the iris with a secondary uveitis and endophthalmitis. See also ulcer.
Enlarge picture
Corneal ulcer in a horse. By permission from Knottenbelt DC, Pascoe RR, Diseases and Disorders of the Horse, Saunders, 2003
corneal vascularization
results from inflammation of the cornea, the vessels growing in from the limbus. It is a necessary repair process but it reduces visual acuity.
References in periodicals archive ?
Eye damage, defined as having a central corneal scar or a decrease in visual acuity, or needing a corneal transplant, was indicated in 213 (19.
They reported corneal scar in 16% eyes compared to 59.
9) reported that the rate of corneal scar development because of foreign bodies were 88%.
Case two is 11 years old boy who has healed geographical corneal scar in left eye, CD4 count is 1303 with stage 2 disease, not on ART at the time of examination.
1) but a corneal scar with prolapsing intra-ocular tissue was visible on elevating the upper lid (Fig.
Long-term management includes: refractive correction of the astigmatism generated by a corneal scar, penetrating keratoplasty when the scar compromises the visual axis directly or when there is corneal decompensation due to endothelial cell damage, and cataract surgery if required (4).
On May 18, Troy was seen in the ophthalmology department and found to have a traumatic cataract, a peaked iris, and a corneal scar in his left eye.
The disease generally progresses rapidly and can lead to corneal scar, stromal abscess formation, perforation, and dissemination to adjacent tissues if not treated properly.
Simultaneously frequent iritis during reaction might have induced damage to the iris and later, with due course of time, attachment of the iris to the corneal scar.
We suggest that the stitches should be sutured avoiding the visual axis, preventing secondary corneal scar, and reducing postoperative astigmatism.
Corneal scar and a few isolated carbon particles were observed in the inferonasal paracentral cornea of the right eye.
This bird lacked a menace response bilaterally, although the only other ophthalmic lesion was a small corneal scar OS, and it was clinically visual.