corneal stroma การใช้

• Transforming growth factor beta-induced protein in the superficial corneal stroma.
• When this happens, the blade inadvertently cuts into the collagenous corneal stroma and creates an irregularity.
• Melting ulcers reflect inappropriate collagenolysis of the corneal stroma, by matrix-metalloproteinases ( MMPs ).
• The images showed a thin layer of corneal collagen between the corneal stroma and Descemet's membrane.
• If the corneal stroma develops visually significant opacity, irregularity, or edema, a cornea of a deceased donor can be transplanted.
• The response may result in the destruction of the corneal stroma, resulting in loss of vision due to opacification of the cornea.
• The corneal scarring is the end result of the initial invasion of blood vessels into the corneal stroma as part of the inflammatory response.
• "' Terrien marginal degeneration "'is a noninflammatory, unilateral or asymmetrically bilateral, slowly progressive thinning of the peripheral corneal stroma.
• Performing the laser ablation in the deeper corneal stroma provides for more rapid visual recovery and less pain than the earlier technique, photorefractive keratectomy ( PRK ).
• At its centre, human corneal stroma is composed of about 200 flattened " lamell?" ( layers of collagen fibrils ), superimposed one on another.
• 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.
• It acts as a barrier to protect the cornea, resisting the free flow of fluids from the tears, and prevents bacteria from entering the epithelium and corneal stroma.
• 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.
• In a " pocket cross-linking " procedure, riboflavin is injected directly into the corneal stroma via a corneal pocket in order to bypass the epithelium, which is left intact.
• During development of the embryo, the corneal stroma is derived from the neural crest ( a source of mesenchyme in the head and neck ) which has been shown to contain mesenchymal stem cells.
• In the cornea, whose endothelial cells have been known to express RAGE and galectin-3, the accumulation of AGEs is associated with thickened corneal stroma, corneal edema, and morphological changes within patients with diabetes.
• Moreover, it may also serve as a barrier that prevents direct traumatic contact with the corneal stroma and hence it is highly involved in stromal wound healing and the associated restoration of anterior corneal transparency at the morphological level.
• "' 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.
• In this procedure, an ophthalmologist makes an incision in the cornea of the eye, and inserts two crescent or semi-circular shaped ring segments between the layers of the corneal stroma, one on each side of the pupil.
• LASEK and PRK permanently change the shape of the anterior central cornea using an excimer laser to ablate ( remove by vaporization ) a small amount of tissue from the corneal stroma at the front of the eye, just under the corneal epithelium.