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| The capsule of the lens from the lens equator forward. |
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| The space defined by the cornea and Iris anteriorly and posteriorly. It is filled with aqueous humor. |
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| The anatomic zone between the cornea and the iris containing that Trabecular meshwork. |
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| An arc shaped incision in the cornea which is used to correct astigmatism |
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| The shape variation in the cornea which causes it to be curved more in one direction than another( shaped more like a football then a basketball). |
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| The acellular stromal tissue between the cellular corneal stroma in the basement membrane of the epithelial cells. |
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| Corneal storage and viewing. chamber. A container used to store donor corneas and also view them for specular microscopy |
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| The inner or outer corner where the eyelids me. The medial canthus is the juncture of the lids near the nose. The lateral canthus is the juncture of the lids near the ear. |
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| The small conjunctival membrane at the medial campus that also has sebaceous glands and occasionally fine hairs. |
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Definition
| A change in the lens proteins which cause a decrease in its clarity. This can occur in the nucleus cortex or in the zone just inside the capsule. |
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| The layer between the retina in the Scalera which contain many large and small blood vessels as well as Bruch's membrane. It is supplied by the ciliary circulation from the ophthalmologist artery. It supplies the metabolic nutrients to the retina. |
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Definition
| The eyelashes which grow from the skin side of the lid margin. |
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| The structure of muscular and granular tissue at the Peripheral base of the iris. It produces aqueous fluid, can contract to cause front to back thickening of the lens for close focusing, and extends from the root of the iris to approximately the pars plana. |
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Definition
| The thin clear mucosal membranes that contains blood vessels, nerves and glands. It attaches to the Limbus, allows the eye to move, and separates the inner orbital structure from the outside. |
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Definition
| The clear connective tissue membrane which assists in the focusing of light and provides a smooth anterior optical surface. |
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Definition
| The protrusion caused by localized swelling along curved linear pass of the corneal stroma. The swelling forms a line or ridge referred to as fold in the Descemet's. It represents thickening of the cornea which causes ridges to form internally at the level of Descemet's membrane, since the outter corneal surface cannot change (it is on maximal stretch to form the anterior corneal surface). |
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Definition
| The cells which form the innermost layer of the cornea. |
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Definition
| The outer surface of the cornea. |
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Definition
| The absence of a portion of the epithelial layer caused by trauma such as a corneal abrasion, infection or intrinsic disease. |
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Definition
| A procedure in which the contents of the globe are removed, leaving only the scleral shell behind. |
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Definition
| The potential space between the lids and the globe. Normally the space doesn't exist because the lid is against the globe. If the lid is pulled away from the globe, the space can be seen, and is called the fornix. |
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Definition
| The wart like excrescences of Descemet's which are the primary abnormality seen in Fuchs endothelial dystrophy. Generally seen on specular reflection or specular microscopy. The plural is guttae. Maybe seen and literature as guttata or guttatae. |
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Definition
| The optical condition of the eye in which images come into focus behind (short eye) to the retina, also known as farsightedness. |
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Definition
| Intraocular lens implant. |
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Definition
| The presence of excessive Bilirubin, a compound which the body produces during the breakdown of hemoglobin, at a high level in the blood. This causes a yellowish discoloration of the skin. It is synonymous with Jaundice. |
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Definition
| The presence of white blood cells which accumulate in the cornea as an inflammatory response to infection, exposure or other stimuli. It usually appears as white, gray, or slightly yellowish spot in the corneal epithelium or the stroma. |
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Definition
| The color portion of Eye. |
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Definition
| The spoke like muscles which contract to open the pupil. |
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Definition
| The round sphincter muscle which acts like a pursestring to close the pupil. |
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Definition
| Also known as KP, they are the accumulation of white blood cells on the corneal endothelium which arise as a result of inflammatory reactions. They 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 and distribution, occupying less than 5 to 10% of the stroma. |
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Definition
| Any tissue altering surgical procedure on the cornea. |
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Definition
| The reshaping of a partial thickness layer of the cornea done to change its refractive state. |
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Definition
| The removal of a partial thickness layer of the cornea. |
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Definition
| The angle formed by the joining of the lids furthest from the midline or closest to the ear. |
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Definition
| The Crystaline protein structure, which is normally flexible to allow focusing in the early years of life. Later, it becomes less flexible, maybe cloudy and require removal. |
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Definition
| The relatively soft lens material just inside the capsule. |
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Definition
| The inner, harder portion of the lens which has several layers. |
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Definition
| The lower most edge of the upper lid or uppermost edge of the lower lid which contains the opening of the Meibomian glands. It is the location of the junction of the skin and mucosas membranes. |
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Definition
| The juncture between the cornea in the Scalera. It is not a separate anatomical structure, but is defined as an anatomical transition zone. |
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Definition
| The angle of the eyelid opening nearest to the midline or nasal side. |
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Definition
| The sebaceous/oil glands within The eyelid tarsal plates. They release oil into the surface of The eye which forms the surface layer of the tear film, preventing evaporation. |
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Definition
| The optical condition of the eye in which images come into focus in the front of the retina also known as nearsightedness. |
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Definition
| The anatomic zone between the ending of the ciliary body posteriorly and the retina anteriorly. |
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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
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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 tissue from a donor. |
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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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Definition
| The abnormal growth of conjunctival tissue which occurs in the three or 9 o'clock meridians at the limbus, but does not cross the limbus. |
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Definition
| Variation of endothelial cell shape, also known as pleomorphism. |
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Definition
| Variation of endothelial cell size. |
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Definition
| The capsule of the lens from the lens equator posteriorly. |
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Definition
| The portion of the posterior to the iris. |
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Definition
| The combination of the mucous which adheres to the cornea. |
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Definition
| Dark spots on the endothelium seen while the cornea is cold which disappear when the cornea is warmed to room temperature. |
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Definition
| The abnormal growth of conjunctiva will tissue which occurs in the three or 9 o'clock meridians at the Limbus, which crosses the limbus and grows onto the cornea. |
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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
| The opening in the iris which changes in size with response to different light levels. It is similar to the aperture in the camera. |
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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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Definition
| The muscles which act directly up and down or left and right. There are four rectus muscles, the superior, medial, inferior and lateral. |
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Definition
| The membrane which consist of the nerves, pigment layer photoreceptors and supporting cells that sense the reception of light within the eye. |
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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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Definition
| One of the folds of the conjunctiva that is the transition between the medial canthus Caruncle the medial conjunctiva. |
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Term
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Definition
| Also known as endothelial stress lines. |
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Term
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Definition
| The procedure in which the endothelium maybe viewed through the slitlamp. |
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Definition
| The thick Central layer of the cornea which is composed of highly ordered matrix of collagen fibers. It provides most of the cornea's strength and optical clarity. |
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Term
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Definition
| Also known as snail tracks or endothelial striate, refer to Linear opacities seen at the level of the 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 from Descemet's membrane. |
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Term
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Definition
| Grayish white lines within the stromal substance itself which are caused by swelling between the layers of the corneal stromal collagen. |
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Definition
| The cartilage like plate within the eyelids which harbors the meibomian glands and gives structural support to the lid. |
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Definition
| The connective tissue Fascia which inserts at the limbus, between the conjunctiva in the Scalera, and covers the globe and muscles. Also known as the episclera. |
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Definition
| The iris ciliary body and choroid. |
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Definition
| The small fibers that attach the peripheral lens to the ciliary body. |
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