Term
| Penetrating Keratoplasty (PK or PKP) |
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Definition
| Traditional full thickness transplant |
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Term
| Anterior Lamellar Keratoplasty (ALK) |
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Definition
| Selective transplant of the anterior section of the cornea |
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Term
| Deep Lamellar Endothelial Keratoplasty (DLEK) |
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Definition
| In the DLEK technique, the preoperative corneal surface is left untouched in an attempt to preserve normal corneal topography. The corneal limbus is preserved to aid in the structural integrity of the globe, and to allow endothelial transfer in a relatively closed controlled system. |
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Term
| Descemet's Stripping Endothelial Keratoplasty (DSEK) |
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Definition
Partial thickness and sutureless cornea transplant. descemet and endothelium layer are stripped from the recipient and replaced with a thin posterior section of a donor cornea
*Most common type of endothelial keratoplasty, thicker than DMEK |
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Term
| Deep Anterior Lamellar Keratoplasty (DALK) |
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Definition
| selective transplant of a deeper anterior section of the cornea |
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Term
| Descemet's Membrane Endothelial Keratoplasty (DMEK) |
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Definition
partialthickness transplant of a very thin posterior section of cornea
*thinner than DSEK |
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Term
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Definition
| A surgical procedure on the cornea aimed at correcting ametropia. The patient's corneal epithelium is removed and a donor's corneal disc (or lenticule) that was previously frozen and reshaped to produce a new anterior curvature is rehydrated and sutured to Bowman's membrane |
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Term
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Definition
| 2 types of grafts: Full thickness: preferred for infective etiologies Lamellar: preferred for non infective situations Most patch grafts need to be fashioned freehand |
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Term
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Definition
| refractive keratoplasty removal of a section of cornea from a patient or donor, which is shaped to the desired curvature and inserted either between (keratophakia) layers of or on (keratomileusis) the patient's cornea to change its curvature and correct optical errors. |
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Term
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Definition
| Trabeculectomy is a surgical procedure used in the treatment of glaucoma to relieve intraocular pressure by removing part of the eye's trabecular meshwork and adjacent structures. It is the most common glaucoma surgery performed and allows drainage of aqueous humor from within the eye to underneath the conjunctiva where it is absorbed. |
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Term
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Definition
Ocular implantation after enucleation – a synthetic eye implant is wrapped in sclera. The muscles are then attached to the sclera, which allows the artificial eye to move with the companion eye.
Lid retraction – the sclera is used to reconstruct the eyelid
Glaucoma surgery – a Ahmed valve is inserted into the eye to reduce intraocular pressure. The valve is covered with a piece of sclera to allow movement of the eyelids across the implant. |
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Term
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Definition
| Keratolimbal allograft is an eye reconstruction surgical procedure that involves the transplanting of limbal epithelial stem cells of the cornea from a cadaveric donor. |
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Term
| Lamellar Keratoplasty (LK) |
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Definition
| The philosophy of lamellar keratoplasty (LK) is to selectively replace only the diseased tissue and leave the healthy tissue intact, to resect the least amount of tissue for the greatest amount of good. LK has been successful in the treatment of anterior corneal pathology for over 100 years. Only recently have the techniques of LK been applied to the replacement of the posterior tissue and the endothelium. |
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Term
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Definition
| tectonic keratoplasty transplantation of corneal material to replace tissue which has been lost. |
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Term
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Definition
| transplantation of corneal material to replace scar tissue which interferes with vision. |
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Term
| Conjunctival Limbal Allograft |
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Definition
| If the cells are removed from the normal healthy eye of a living relative then a procedure known as Conjunctival Limbal Allograft is performed. |
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