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Definition
| The anatomic zone between the cornea and the iris containing the trabecular meshwork. |
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Definition
| AKA arcus senilis. refers to peripheral clouding of the cornea due to lipid (cholesterol) near the limbus in what would be normally clear stroma. |
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Definition
| An arc shaped incision in the cornea which is used to correct astigmatism. |
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Definition
| The shape variation of the cornea which causes it to be curved more in one direction than another (shaped more like a football than a basketball) |
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Definition
| Corneal Storage and Viewing Chamber. A container used to store donor corneas and also view them for specular microscopy |
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Definition
| A change in the lens proteins which causes a decrease in its clarity. This can occur in the nucleus (innermost part/nuclear cataract, nuclear sclerosis), cortex (middle part/cortical cataract, cortical spokes) or in the zone just inside the capsule (the outermost membrane/subcapsular cataract) |
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Definition
| protrusion caused by localized swelling along curved linear paths of the corneal stroma. The swelling forms a line or ridge referred to as fold in Descemet's. It represents a thickening of the cornea which causes ridges to form internally at the level of descemet's membrane, since the outer corneal surface cannot change (it is already on maximal stretch to form the anterior corneal surface) |
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Term
| endothelial striae (snail tracks, endothelial stress lines) |
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Definition
| Refer to linear opacities seen at the level of Descemet's endothelium. These represent areas where folding of the cornea has caused stretching of the endothelium and generally rupture of the endothelium and/or separation of from Descemet's membrane. |
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Definition
| removal of the globe from a donor cadaver |
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Definition
| spoon shaped instrument with a notch cut out for the optic nerve to allow elevation of the eye ball |
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Definition
| The absence of a portion of the epithelial layer caused by trauma such as corneal abrasion, infection, or intrinsic disease. |
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Definition
| a procedure which the contents of the globe are removed, leaving only the scleral shell behind. |
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Term
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Definition
| Removal of the corneal cap with a scleral rim of tissue from the globe. This can be done in-situ or in the lab under a laminar flow hood. |
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Term
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Definition
| The wart-like excresences of Descemet's which are the primary abnormality seen in Fuch's endothelial dystrophy. Generally seen on specular reflection or specular microscopy. The plural of gutta is guttae or Guttatae. |
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Definition
| The optical condition of the eye in which images come into focus behind the retina, also known as far-sightedness. |
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Term
| intraocular lens implant (IOL) |
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Definition
| anterior chamber lens implant placed in front of the iris or a posterior chamber lens implant placed in the capsular bag or between the capsular bag and the posterior iris/ciliary sulcus. May be sewn to the iris or sclera. |
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Term
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Definition
| Presence of excess bilirubin in the blood. Causes yellowish skin or sclera. (Jaundice) |
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Definition
| The presence of white blood cells which accumulates in the cornea as an inflammatory response to infection, exposure or other stimuli. Usually appears as a white, gray, or slightly yellowish spot in the corneal epithelium or stroma. |
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Term
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Definition
| The accumulation of white blood cells on the corneal endothelium which arise as a result of inflammatory reactions. May be seen singularly or frequently as groups of multiple precipitates. |
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Definition
| The basic cell type which is found in the corneal stroma. The keratocytes are sparse in distribution, occupying less than 5-10% of the stroma. |
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Definition
| Any tissue altering surgical procedure of the cornea. |
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Definition
| The reshaping of a partial thickness layer of the cornea done to change it's refractive state. |
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Term
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Definition
| The removal of a partial thickness layer of the cornea |
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Term
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Definition
| The optical condition of the eye in which images come into focus in front of the retina. Also known as near-sightedness |
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Term
| penetrating keratoplasty (PK) |
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Definition
| The procedure in which a full thickness button of cornea is removed from the recipient and replaced with a similar sized or larger button of donated cornea tissue. |
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Term
| photorefractive keratectomy |
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Definition
| Laser assisted removal of part of the anterior corneal stroma to change the refractive state of the eye. |
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Term
| phototherapeutic keratectomy |
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Definition
| Laser assisted removal of part of the anterior corneal stroma to remove scar tissue from the cornea. |
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Term
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Definition
| The abnormal growth of conjunctival tissue which occurs in the three or nine o'clock meridians at the limbus, but does not cross the limbus. |
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Term
| pleomorphism (polymorphism) |
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Definition
| variation of the endothelial cell shape, also known as polymorphism |
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Term
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Definition
| Variation of endothelial cell size |
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Term
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Definition
| dark spots on the endothelium seen while the cornea is cold which disappear when the room is warmed to room temperature |
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Term
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Definition
| The abnormal growth of conjunctival tissue which occurs in the three or nine o'clock meridians at the limbus, which crosses the limbus and grows onto the cornea |
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Term
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Definition
| The opening of the lacrimal drainage system which passively or actively allows tears to drain from the eyelid surface |
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Definition
| a surgical procedure in which four, six, eight or more radial incisions are made in the cornea to reduce myopia. |
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Term
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Definition
| The pattern formed when a small endothelial cell is surrounded by larger nearest neighbor cells, making it appear flower like. |
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Term
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Definition
| Fibrous tissue replacing the normal tissue destroyed by injury or disease. The size, density, and depth should always be mentioned in any evaluation. Any opacity or irregularity that cannot be otherwise identified as normal anatomy can be included in this term |
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Term
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Definition
| One of the folds of conjunctiva that is the transition between the medial canthus caruncle and medial conjunctiva |
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Term
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Definition
| The procedure in which the endothelium may be viewed through the slit lamp |
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Term
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Definition
| Grayish white lines within the stromal layers of the corneal stromal collagen. This causes light to scatter from these areas of localized linear swelling and form striae May occur at any depth in the stroma. -See endothelial striae |
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Term
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Definition
| The meshwork of tissue that allows aqueous fluid to flow from the anterior chamber into Schlem's canal which drains the fluid away from the eye. |
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