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Case of the week 119  ( June 2013 )
Consecutive Exotropia




Vision: OD 6/6
OS 6/60
Refraction: OD +1.25 
               OS +0.75

This 25 years man has a history of what appears to be congenital esotropia. He had a bimedial rectus recession at age 5 years. Because of a residual esotropia he later underwent bilateral lateral rectus resection at age 15 years. This resulted in a large angle consecutive exotropia. The patient is eager to have the eyes aligned.



Many years of working on such cases where prior surgeries were done ,  the surgeons are not known , the operative details are exactly unknown and the results are not good taught me it is best to deal with the patient more of less as a "new" patient.

Based on the above, this young man has a huge Lt. XT, the 2 MR are possibly recessed and the 2 LR are possibly resected. 

These cases require decisions be made in the operating room depending on what is found and on the operative scinario.

         I did a large recession for the previously resected left LR putting the muscle at or very near the equator. I found the lateral conjunctiva is tight , so I slightly recessed it. Then I advanced and resected the previously recessed Lt MR  as much as I can without pulling forward tissues of the medial orbit , the MR is sutured nearly at its original insertion ( 5.5 mm of the limbus )

In cases like this, the big challenge of the surgeon is the fibrosis of the periorbital tissue,  I always be sure to do forced ductions before and after detaching the muscles to asses this fibrosis . Fibrosis of the periorbital tissue is the main cause of limited ductions following previous orbital surgeries, it is also the main cause of disappointing undercorrection of these patients .  So, forced ductions will be a clue as to what you can expect from this part of the operation. Also, be sure to avoid inclusion of the inferior oblique in the left lateral rectus.

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