The study aims to investigate ocular motor and sensory outcomes of two different strategies of lateral rectus recession; symmetric and asymmetric, in management of basic type intermittent exotropia with ocular dominance.
Surgical management of basic -type intermittent exotropia with a dominant eye is controversial. Some surgeons do traditional symmetrical bilateral lateral rectus recession, while other perform unilateral recess-resect procedure in the non-dominant eye. The aim of this study is to investigate the effect of two different strategies of bilateral lateral rectus recession; symmetrical recession in which the amount of recession is equally divided between both eyes, and asymmetrical recession, in which the amount of recession is 2mm more in the non-dominant. Outcome measures include ocular deviation at distant and near fixation, sensory status and complications.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
40
Symmetric bilateral lateral rectus muscle recession involves equal recession of both lateral rectus muscles. Asymmetric bilateral lateral rectus muscle recession involves recession of the lateral rectus muscle by 2mm more in the non-dominant eye.
Benha University
Banhā, Qalyubiyya, Egypt
Ocular Alignment at Distant Fixation
ocular alignment in prism diopter (PD) at distant fixation (6 meter) is measured using alternate prism and cover test (APCT) while patient wears refractive correction.
Time frame: one year
Ocular Alignment at Near Fixation
ocular alignment in prism diopter (PD) at near fixation (1/3 meter) is measured using alternate prism and cover test (APCT) while patient wears refractive correction.
Time frame: one year
Sensory Status (Stereopsis)
ocular sensory status (stereopsis) is assessed using Titmus fly test and is recorded as seconds of arc.
Time frame: one year
Sensory Status (Fusion)
Fusion is assessed using Worth 4-dot test, and is documented as present (positive fusion) or absent (absent fusion).
Time frame: one year
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