Symmetric vs Asymmetric BLR Recession in Management of Basic IXT With Ocular Dominance

Benha University

Status: Completed

Conditions: Intermittent Exotropia

Treatments: Procedure: Bilateral Lateral Rectus Recession

Study type: Interventional

Funder types: Other

Identifiers

NCT05234957

RC1-1-2022

Details and patient eligibility

About

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.

Full description

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.

Enrollment: 40 patients

Sex: All

Ages: 4+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Basic-type intermittent exotropia
• Simulated distant-type intermittent exotropia

Exclusion criteria

• Alternating basic-type intermittent exotropia (no ocular dominance)
• Distant-type intermittent exotropia
• Convergence-insufficiency type intermittent exotropia
• Constant exotropia
• Sensory exotropia
• Deep amblyopia
• Paralytic or restrictive exotropia
• Previous extraocular muscle surgery

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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40 participants in 2 patient groups

Group 1

Active Comparator group

Description:

Symmetric bilateral lateral rectus recession (S-BLR). The amount of bilateral lateral rectus recession is equally divided between both eyes.

Treatment:

Procedure: Bilateral Lateral Rectus Recession

Group 2

Active Comparator group

Description:

Asymmetric bilateral lateral rectus recession (A-BLR). The amount of bilateral lateral rectus recession is asymmetrically divided between both eyes, with 2mm more recession in the non-dominant eye.

Treatment:

Procedure: Bilateral Lateral Rectus Recession