The Effect of Slanted Recession of Horizontal Muscle on Horizontal Strabismus With Abnormal Accommodative Convergence /Accommodation Ratio (AC/A)

Phase 2

• Conditions: Horizontal Strabismus With High AC/A Ratio
• Interventions: Procedure: conducting the slanted recession technique on the superior and inferior poles; Procedure: conducting the augmented recession technique on the muscle

• Registration Number: NCT03555045
• Lead Sponsor: Shahid Beheshti University of Medical Sciences

Brief Summary

Different methods was tried to treat high AC/A strabismus cases;such as prescription of bifocal glasses in esotropia,recession of horizontal muscles with posterior fixation sutures,more recession than needed for far deviation(augmented recession),recession and pulley fixation and slant recession.

Different results was reported for any type of above methods. In recent studies,slanted recession was applied for high AC/A in esotropic cases and success rate of 67% was reported.but there was no unanimity for procedure of choice.

Since slant recession method is simpler and has low side effect than the other methods,therefore in this study the investigators want to peruse the outcome of this method on high AC/A horizontal strabismus.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-02-01
• Primary Completion: 2017-07-01
• Status Verified: 2018-01
• Study First Submitted: 2018-04-11
• Study First Submitted QC: 2018-06-12
• Last Update Submitted: 2018-06-12
• Study First Posted: 2018-06-13
• Last Update Posted: 2018-06-13
• Study Completion: 2019-05

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

• all patients with horizontal strabismus that the different between far deviation and near deviation is more than 10 pd

Exclusion Criteria

• all patients who had history of surgery on horizontal muscles and patients with pseudo high AC/A ratio.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
conducting the slanted recession technique	conducting the slanted recession technique on the superior and inferior poles	conducting the slanted recession technique on the superior and inferior poles of the muscle based on far and near deviations.
conducting the augmented recession technique on the muscle	conducting the augmented recession technique on the muscle	conducting the augmented recession technique on the muscle for 1 to 1.50 mm more compared with the standard method.

Primary Outcome Measures

Name	Time	Method
far-near deviation difference	90 days after surgery	difference between the far and near deviations

Secondary Outcome Measures

Name	Time	Method
success rate of surgery	90 days after surgery	in cases with difference of far and near deviation less than 10 prism diopters

Trial Locations

Locations (1)

Ophthalmic Research Center; 🇮🇷 Tehran, Iran, Islamic Republic of