Term
| What are the six extrinsic eye muscles? |
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Definition
| Superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique, and inferior oblique. |
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Term
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Definition
| A misalignment or deviation of the eyes. |
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Term
| What are the other forms of a strabismus? |
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Definition
| Esotropia: Eye turns medially (crossed eyes), Exotropia: Eye turns laterally (wall eyes), Hypertrophia: Eye turns upward. |
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Term
| Why do we do adjustable suture surgery? |
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Definition
| For adults with a diplopia stabismus, the suture technique allows a more accurate alignment and the field of vision is more exact. |
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Term
| When can an adjustable suture surgery be performed? |
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Definition
| After the anesthesia has worn off from their stabismus recession but not more than 24 hours after surgery. |
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Term
| What are the two ways to correct a Stabismus? |
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Definition
Recession: recess muscles especially the vertically acting muscles.
Resection: Is when you remove a section of muscle. Greater affect on the lateral rectus. |
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Term
| What instruments can be used to make the first incision? Where is the incision made? |
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Definition
| A radial incision can be made with either westcott scissors or a disposable eye knife. |
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Term
| Why is a second radial incision made? |
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Definition
| To create a flap of conjunctiva Tenons capsule that can be dissected to expose the upper and lower border of muscle. |
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Term
| What sutures are used to apply traction before the muscle is reattached at the new insertion point? |
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Definition
| 4-0 or 6-0 vicryl or silk sutures. |
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Term
| Why do you use a strabismus hook? |
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Definition
| To free the muscle from the sclera and move it forward. |
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Term
| What type of sutures would be used to close the conjunctiva ? |
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Definition
| 6-0 absorbable or 7-0 chromic gut. |
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Term
| When doing a recession by adjustable suture, what suture is used to secure it? |
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Definition
| A double armed 6-0 polyglactin suture. |
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Term
| What is the difference between closing the conjunctiva when doing a strabismus correction verses doing a recession by adjustable suture? |
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Definition
| In the stabismus correction it is closed with an absorbable suture, with the recession it is closed using silk so that the slipknot is exposed for later adjustment. |
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Term
| Why would you use a caliper for a strabismus correction? |
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Definition
| To measure the distance from the original point of insertion to the new one. |
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Term
| What is the function of the extrinsic eye muscles? |
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Definition
| To move the eye in a coordinated manner, in various directions. And each muscle is associated with one primary movement but any eye movement can involve more than one muscle. |
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