Comparison of Three Vision Therapy Approaches for Convergence Insufficiency

S

Shahid Beheshti University of Medical Sciences

Status and phase

Unknown
Phase 2

Conditions

Comparison of Three Vision Therapy Approaches for Convergence Insufficiency

Treatments

Procedure: using a major amblyoscope twice weekly with additional home orthoptic therapy
Procedure: trained to do the pencil push-ups procedure
Procedure: using three diopter over-minus lenses and a base out prism

Study type

Interventional

Funder types

Other

Identifiers

NCT03431454
92149

Details and patient eligibility

About

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 randomly allocated into three groups. In the home-based vision orthoptic therapy (HBVOT) group, patients were trained to do the pencil push-ups procedure 15 minutes per day, five days a week. In the office-based vision orthoptic therapy (OBVOT) group, 60 minutes of orthoptic therapy using a major amblyoscope twice weekly with additional home orthoptic therapy was prescribed. For the augmented office-based vision orthoptic therapy (AOBVOT) group, orthoptic exercises using three diopter over-minus lenses and a base out prism, in addition to major amblyoscope and additional home reinforcement was prescribed in the same period of time.

Enrollment

48 estimated patients

Sex

All

Ages

15 to 35 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

  • 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 criteria

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

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Double Blind

48 participants in 3 patient groups

home-based vision orthoptic therapy (HBVOT) group
Active Comparator group
Description:
In the home-based vision orthoptic therapy (HBVOT) group, patients were trained to do the pencil push-ups procedure 15 minutes per day, five days a week
Treatment:
Procedure: trained to do the pencil push-ups procedure
office-based vision orthoptic therapy (OBVOT) group
Active Comparator group
Description:
In the office-based vision orthoptic therapy (OBVOT) group, 60 minutes of orthoptic therapy using a major amblyoscope twice weekly with additional home orthoptic therapy was prescribed
Treatment:
Procedure: using a major amblyoscope twice weekly with additional home orthoptic therapy
augmented office-based vision orthoptic therapy (AOBVOT) group
Active Comparator group
Description:
For the augmented office-based vision orthoptic therapy (AOBVOT) group, orthoptic exercises using three diopter over-minus lenses and a base out prism, in addition to major amblyoscope and additional home reinforcement was prescribed in the same period of time.
Treatment:
Procedure: using three diopter over-minus lenses and a base out prism

Trial contacts and locations

1

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Central trial contact

Maryam Aletaha, MD

Data sourced from clinicaltrials.gov

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