Status:
UNKNOWN
Comparison of Three Vision Therapy Approaches for Convergence Insufficiency
Lead Sponsor:
Shahid Beheshti University of Medical Sciences
Conditions:
Comparison of Three Vision Therapy Approaches for Convergence Insufficiency
Eligibility:
All Genders
15-35 years
Phase:
PHASE2
Brief Summary
We compared the effectiveness of three active vision therapy approaches for convergence insufficiency (CI). Patients with eligible criteria and symptomatic CI were included in a prospective study and ...
Eligibility Criteria
Inclusion
- patients between 15 and 35 years of age who have symptomatic CI using the Convergence Insufficiency Symptom Survey (CISS) scoring system.
- best-corrected visual acuity ≥ 20/25
- exophoria at near at least 4 prism diopters (△) greater than at distance
- near point of convergence more than 6.0 cm break
- insufficient positive fusional vergence (PFV) (failing Sheard's criterion or PFV ≤ 15 △ base-out) at near distance.
Exclusion
- amblyopia (VA worse than 20/30 in each eye), presence of manifest strabismus, history of ocular surgery, any systemic disorder, anisometropia of more than 1.5 diopter of myopia or hyperopia or significant refractive error, and nystagmus and usage of medications that may impair accommodation or convergence. ,ocular surface abnormalities or history of ocular allergy or those who had previously been treated for CI
Key Trial Info
Start Date :
February 1 2018
Trial Type :
INTERVENTIONAL
Allocation :
ESTIMATED
End Date :
December 1 2018
Estimated Enrollment :
48 Patients enrolled
Trial Details
Trial ID
NCT03431454
Start Date
February 1 2018
End Date
December 1 2018
Last Update
February 13 2018
Active Locations (1)
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1
Ophthalmic Research Center
Tehran, Iran