This is a randomized comparative interventional study that aims to compare the surgical outcomes of correcting large angle exotropia (≥50 prism diopter) by three different surgical techniques including: 1/ bilateral lateral rectus muscle recession with unilateral medial rectus muscle resection 2/bilateral medial rectus muscle resection, 3/unilateral medial rectus muscle resection with lateral rectus muscle transplantation,
This is a randomized comparative interventional study that will be conducted on patients with large angle exotropia before and after doing surgical correction using three different surgical techniques including : 1/ bilateral lateral rectus muscle recession with unilateral medial rectus muscle resection 2/bilateral medial rectus muscle resection, 3/unilateral medial rectus muscle resection with lateral rectus muscle transplantation ,to compare the surgical outcomes between them.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
60
patients with large angle exotropia will be treated by three different surgical techniques including: 1/ bilateral lateral rectus muscle recession with unilateral medial rectus muscle resection 2/bilateral medial rectus muscle resection, 3/unilateral medial rectus muscle resection with lateral rectus muscle transplantation ,to compare the surgical outcomes between them.
changes in ocular alignment
Detect ocular alignment by using Krimsky test to measure angle of deviation in prism diopter
Time frame: at one month, 6 month and one year postoperatively.
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