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

Shahid Beheshti University of Medical Sciences

Status and phase: Unknown; Phase 3; Phase 2

Conditions: Horizontal Strabismus With High AC/A Ratio

Treatments: Procedure: conducting the augmented recession technique on the muscle; Procedure: conducting the slanted recession technique on the superior and inferior poles

Study type: Interventional

Funder types: Other

Identifiers

NCT03555045

96302

Details and patient eligibility

About

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.

Enrollment: 100 estimated patients

Sex: All

Ages: 6 to 80 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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100 participants in 2 patient groups

conducting the slanted recession technique

Active Comparator group

Description:

conducting the slanted recession technique on the superior and inferior poles of the muscle based on far and near deviations.

Treatment:

Procedure: conducting the slanted recession technique on the superior and inferior poles

conducting the augmented recession technique on the muscle

Active Comparator group

Description:

conducting the augmented recession technique on the muscle for 1 to 1.50 mm more compared with the standard method.

Treatment:

Procedure: conducting the augmented recession technique on the muscle