The Effect of Slanted Recession of Horizontal Muscle on Horizontal Strabismus With Abnormal Accommodative Convergence /Accommodation Ratio (AC/A)
Trial Snapshot
- Phase
- Phase 2
- Enrollment
- 100
- Locations
- 1
- Primary Endpoint
- far-near deviation difference
Study Overview
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.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Double (Participant, Care Provider)
Eligibility Criteria
- Ages
- 6 Years to 80 Years (Child, Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
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.
Arms & Interventions
conducting the slanted recession technique
conducting the slanted recession technique on the superior and inferior poles of the muscle based on far and near deviations.
Intervention: conducting the slanted recession technique on the superior and inferior poles (Procedure)
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.
Intervention: conducting the augmented recession technique on the muscle (Procedure)
Outcomes
Primary Outcomes
far-near deviation difference
Time Frame: 90 days after surgery
difference between the far and near deviations
Secondary Outcomes
- success rate of surgery(90 days after surgery)
Investigators
Zahra Rabbani Khah
Clinical Professor
Shahid Beheshti University of Medical Sciences