Term
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Definition
| Injury from burns or penetration wounds, severe infections that lead to corneal scarring, corneal dystrophies, inherited diseases, and other eye surgeries. |
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Term
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Definition
| Reshaping of the cornea in order to alter its refractive power. Replacing cloudy or damaged corneal tissue with healthy donor tissue through a corneal transplant. |
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Term
| True or false: Keratoplasty is the most successful transplant performed on the body. |
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Definition
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Term
| How much larger is the donor cornea than the recipient opening? |
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Definition
| The donor cornea is sized 0.1mm to ensure proper fit. |
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Term
| How soon after the surgery will the patient be able to see through that eye? |
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Definition
| The eye is patched overnight and examined the next day. |
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Term
| Can a corneal transplant improve the recipient's vision enough to remove the need for glasses? |
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Definition
| Yes, the patient may see well enough after the transplant to not need prescription lenses. |
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Term
| What viral infection may be the cause of an unsuccessful transplant? |
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Definition
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Term
| What are 4 warning signs of corneal transplant rejection? |
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Definition
| Pain, light sensitivity, redness, decreasing vision. |
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Term
| Can a keratoplasty be repeated on the same eye? |
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Definition
| Yes, repeat transplants may be performed if needed. |
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Term
| What 2 types of suture material are used in a keratoplasty? |
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Definition
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Term
| What is a trephine and what is it used for? |
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Definition
| It is a cookie cutter like instrument placed directly on the cornea to cut a circular shape around the cornea and into the anterior chamber. |
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Term
| Is the patient awake during this procedure or put under general anesthesia? |
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Definition
| The patient recieves only topical and local anesthesia. The patient needs to be able to focus their gaze during the procedure. |
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Term
| What size suture is used to hold the graft in place? |
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Definition
| 10-0 nylon is used to hold the graft in place. |
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Term
| What is a flieringa ring? |
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Definition
| It is a stainless steal ring sutured to the slcera to support the globe during difficult eye procedures. |
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Term
| What does B.S.S. stand for? And how is it used? |
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Definition
| BALANCED SALT SOLUTION necessary for any ophthalmic procedures to keep the cornea from drying out. It is a sterile, physiologically balanced fluid most frequently employed to irrigate. |
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Term
| Besides the trephine what is another instrument used to cut out the cornea? |
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Definition
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Term
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Definition
| Anesthesia injected around the optic nerve with a combination of lidocaine and bupivacaine. |
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Term
| What are the 5 layers of the cornea? |
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Definition
| Epithelium, Bowman's membrane, stroma, Descemet membrane, and endothelium. |
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Term
| What is the controversial newly discovered layer of the cornea? |
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Definition
| Dua's layer was discovered in 2013 and lies between the stroma and the Descemet layers. |
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Term
| What is different about labeling medications used during eye surgeries? |
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Definition
"for ophthalmic use"
should be included on all ophthalmic labels |
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Term
| What should we as Surgical Technologists expect to count during a Keratoplasty? |
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Definition
| Ray-techs, Weck-Cells, Blades, and Sutures |
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Term
| What procedure involves only the reshaping of the cornea and not having a corneal transplant? |
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Definition
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Term
| What should be confirmed before anesthesia is introduced? |
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Definition
| The arrival of the donor cornea must be confirmed before anesthesia is introduced. |
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Term
| In what case would a keratoplasty include only reshaping of the cornea? |
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Definition
| When the cornea is mishapen and does not need to be replaced it is shaven to change its refractive power. |
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Term
| What is the function of the Cornea? |
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Definition
| It acts as the eye's outmost lens- sharing protective tasks with the eyelid- acting as a window that allows the entry of light into the eye. |
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Term
| A donor cornea specimen is tested for communicable disease before being considered for transplant. Why is the remainder of the donor tissue sent to pathology after being used as transplant? |
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Definition
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Term
| What are 2 retractors that can be used during a keratoplasty to retract the eyelids? |
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Definition
| A Barraquer eye speculum and a lid speculum. |
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Term
| If the trephine is insufficient to remove the cornea what two instruments may be used to complete the cut? |
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Definition
| A diamond knife or corneal scissors. |
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Term
| What is a substitute solution for BSS that can be injected into the anterior chamber after suturing the graft? |
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Definition
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Term
| In what form may the donor cornea arrive? |
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Definition
| It may arrive in either button form, already punched, or globe, the entire eye. |
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