Term
| The five layers of the cornea |
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Definition
| Epethelium, Bowman's membrane (anterior limiting lamina), stroma (substantia propria),Descemet membrane (posterior limiting lamina), and endothelium. |
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Term
| What is the function of the cornea? |
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Definition
| Allows light into the eye and bends the light rays to help the lens focus them upon the retina. |
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Term
| Causes of clouding of the cornea |
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Definition
| Eye injuries, infection, corneal dystrophies, inherited diseases, eye surgeries |
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Term
| Preoperative diagnostic test |
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Definition
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Term
| During corneal transplant surgery, only the ________ part of the cornea is replaced |
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Definition
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Term
| A _________is placed on the cornea and is used to make the corneal cut around the cornea and into the anterior chamber |
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Definition
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Term
| Three steps of corneal transplantation |
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Definition
| (A) Trephination, (B) placement of graft, (C) graft sutured on position |
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Term
| Warning signs of corneal tissue rejection |
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Definition
| Pain, light sensitivity, redness, and decreasing vision |
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Term
| Corneal graft rejection rarely occurs within _________ and may occur as late as ________ following corneal transplant. |
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Definition
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Term
| The sclera forms the majority of the posterior of the globe. The cornea forms the ___________ __________ of the globe |
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Definition
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Term
| Potential new thin layer of the cornea discovered in 2013, located between the stroma and the Descemet membrane. |
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Definition
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Term
| Where does corneal tissue for transplant come from? |
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Definition
| Corneal tissue comes from donors. An eye bank procures the tissue, examines it, and stores it until needed. |
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Term
| How is a Cottingham punch used during the procedure? |
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Definition
| The donor cornea is punched using a Cottingham punch to the correct size for placement. A punch of slightly greater diameter than the punch used for the patient’s host eye is used for the donor cornea. |
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Term
| How is the eye stabilized during the procedure? |
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Definition
| A Fleringa ring is sutured on the patient’s eye with a 5-0 or 6-0 nylon to stabilize the eye. |
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Term
| What is done to reinflate the anterior chamber and ensure the wound is watertight? |
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Definition
| After the graft is sutured in place, BSS or acetylcholine solution is injected into the anterior chamber through a fine cannula (30 gauge) at the graft margin. |
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