Corneal ring, intrastromal
Corneal ring, intrastromal: A plastic ring designed to be implanted in the cornea in order to flatten the cornea and thereby correct, or reduce the degree of, nearsightedness (myopia). The ring is placed in the corneal stroma, the middle of the five layers of the cornea.
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- Corneal topography
Corneal topography: Also known as videokeratography or corneal mapping, corneal topography is a method of computer-assisted examination of the cornea, the clear front portion of the eye that transmits and focuses light into the eye. Corneal topography is performed by projecting illuminated rings onto the corneal surface which are reflected back and measured by the […]
- Corneal transplant
Corneal transplant: Replacement of a portion of the clear window on the front of the eye (cornea) with a healthy cornea. The procedure is typically done under local anesthesia in an outpatient setting. Transplantation of the cornea may be indicated in cases of severe scarring of the cornea by injury or infection (as with corneal […]
- Corns
Small calloused areas of skin caused by local pressure irritating tissue over a bony prominence. Corns most commonly occur over a toe where they form what is referred to as a hard corn. Between the toes, pressure can form a soft corn of macerated skin which often yellows. The word corn comes from the Latin […]
- Coronal
Coronal: A coronal plane through the body is a vertical plane from head to foot and parallel to the shoulders.
- Coronary angiography
The most accurate method (the “gold standard”) for evaluating and defining coronary artery disease (CAD). Coronary angiography is used to identify the exact location and severity of CAD. During coronary angiography, a small catheter (a thin hollow tube with a diameter of 2-3 mm) is inserted through the skin into an artery in the groin […]