Skip to content

Investigation the Effect of Active Vision Therapy Using Vision Therapy System 4 (VTS4) in Bilateral Refractive Amblyopia

Investigation the Effect of Active Vision Therapy on visual skills using Vision Therapy System 4 (VTS4) in children with Bilateral Refractive Amblyopia ages 5-13

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
IRCT
Registry ID
IRCT20230823059229N1
Enrollment
40
Registered
2024-02-28
Start date
2025-03-05
Completion date
Unknown
Last updated
2024-03-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

amblyopia, lazy eye. Refractive amblyopia, bilateral,

Interventions

Intervention 1: "Intervention group:" Patching and Vision therapy exercises in three sessions of 30 minutes a week with the Vision Therapy System version 4 (an American software (HTS Inc., Gold Canyon

Sponsors

Shahid Beheshti University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
All
Age
5 Years to 13 Years

Inclusion criteria

Inclusion criteria: Full patient consent to participate in the study The minimum age is 5 and the maximum is 13 years Bilateral refractive amblyopes Astigmatism more than 1.5 diopters and hyperopia more than 3.00 diopters in each eye or a mix hyperopia-stigmatism Maximum vision 20/40 and minimum vision 20/100 in each eye (moderate amblyopia)

Exclusion criteria

Exclusion criteria: Children who do not cooperate to perform the tests Children who experience diplopia or nausea while using liquid crystal glasses The presence of uncompensated phoria Children who do not have the necessary follow-up for treatment. The existence of pathological and structural problems of the eye History of eye surgeries The presence of nystagmus strabismus, microtropia or eccentric fixation

Design outcomes

Primary

MeasureTime frame
Visual acuity. Timepoint: before and after. Method of measurement: snellen vision chart LCD chart vision (model, HDC-9000N/PF, made in South Korea) Howitz company.;Stereoacuity. Timepoint: before and after. Method of measurement: Randot &; Vectogram Registered trade marks of Stereo Optical Co., Inc and Stereo Fly Stereotest of Stereo Optical Company Inc.;Contrast sensitivity. Timepoint: before and after. Method of measurement: Freiburg contrast sensitivity test, made in Germany, designed by Michael Bach, 2011 version.;Infacility of Accommodation. Timepoint: Before and after. Method of measurement: flipper lens and snellen near chart.

Countries

Iran (Islamic Republic of)

Contacts

Public ContactSaeedeh Hosseinmenni

Shahid Beheshti University of Medical Sciences

s.hoseiny2021@sbmu.ac.ir+98 21 7756 1721

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026