Pilot Study of Accommodative/Vergence Therapy to Modify Accommodative Function in Children With Myopia (ACC)

This study aims to determine the treatment effect of accommodative/vergence therapy on myopic children by assessment of accommodative function before and after therapy.

Study Overview

• Status: Unknown
• Conditions: Myopia
• Intervention / Treatment: Other: accommodative/vergence therapy

Detailed Description

1. Specific aims of the proposed clinical trial:

   1.1 To prove accommodative/vergence therapy (AT) can normalize the accommodative function of myopic children.。 1.2 If the accommodation function of myopic children can be improved with AT therapy, the outcome will supply a basic for a randomized, multi-center clinic trail to determine the effectiveness of AT to slow the progression of myopia.

2. Hypothesis:

Accommodative/vergence therapy can normalize the accommodative functions of 8-12 years old Chinese myopic children.

• Study Type: Interventional
• Enrollment (Anticipated): 30
• Phase: Not Applicable

Contacts and Locations

Study Locations

• China
  • Guangdong
    • Guangzhou, Guangdong, China, 510080
      • Recruiting
      • Zhongshan Ophthalmic Center
      • Contact: Xiang Chen, Ph.D.; Phone Number: 87334687; Email: chen1094@hotmail.com
      • Sub-Investigator: Martin Ma, BSc
      • Sub-Investigator: Candy Su, College
      • Sub-Investigator: Chao Chen, College
      • Sub-Investigator: JunCheng Wang, College

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 8 years to 12 years (Child)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

Subjects enrolled in the trial must:

1. be within the age range of 8 to 12 years old inclusive;
2. -0.75d to -4.50dspherical equivalent by cycloplegic autorefraction in both eyes
3. astigmatism≤1.5d in both eyes；
4. anisometropia≤1.0d；
5. accommodation lag at near(33cm）in right eye by non-cycloplegic auto- refraction ≧1d;
6. have vision correctable to at least 0.8 or better in each eye.

Exclusion Criteria:

Subjects enrolled in the trial must NOT have:

1. current or prior use of progressive addition lens, bifocals, or contact lenses in either eye( prior or current use of single vision lens allowed)；
2. history of any of the following functional defects: strabismus, amblyopia, nystagmus；
3. history of diabetes or seizures；
4. history of any ocular systemic, or neuro-developmental condition that might influence refractive development；
5. use of ocular or systemic medications known to affect accommodation, such as atropine, pirenzepine, and anti-epileptic medications in recent 3 months；
6. history of any ocular surgery that might influence refractive development；
7. developmental disability, attention deficit hyperactivity disorder(ADHD), or learning disability diagnosis in children that in the investigator's discretion would interfere with office-based treatment；
8. relocation anticipated for 3 years；
9. birth weight lower than 1250 grams（2lbs,12oz）；
10. siblings in the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Accommodative/Vergence Therapy; Accommodative/Vergence Therapy. No drug involved.	Other: accommodative/vergence therapy; 12 weekly accommodative/vergence therapies

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in lag of accommodation assessed by open-field autorefractor from baseline visit at 6 months after 12 weekly vision therapies	We will measure the lag of accommodation objectively in right eye at 33 cm by using open-field autorefractor. An average of 10 static measurements will be recorded in spherical equivalent dioptric power.	Baseline visit, 7th visit(7 weeks after BL), 13th visit (13 weeks after BL), 14th visit(9months after BL, which is also 6months after vision therapies )

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in accommodative amplitude assessed by push-up technique from baseline visit at 6 months after 12 weekly vision therapies	We will measure the accommodative amplitude in right eye by using push-up technique with the use of Gulden accommodation rule. An average of 3 measurements will be recorded in spherical dioptric power.	Baseline visit, 7th visit(7 weeks after BL), 13th visit (13 weeks after BL), 14th visit(9months after BL, which is also 6months after vision therapies )
Change in accommodative variability assessed by open-field autorefractor from baseline visit at 6 months after 12 weekly vision therapies	We will measure the level of fluctuation in lag of accommodation at 33 cm objectively by using open-field autorefractor. A 1 minute continuous measurement will be taken in right eye. The unit of measurement is spherical equivalent dioptric power.	Baseline visit, 7th visit(7 weeks after BL), 13th visit (13 weeks after BL), 14th visit(9months after BL, which is also 6months after vision therapies )
Change in accommodative facility assessed by flipper bar method from baseline visit at 6 months after 12 weekly vision therapies	We will measure the accommodative facility at 40 cm by flipper bar method using a ±2.00 diopters lens flipper. 1 measurement will be taken in right eye. The unit of measurement is cycles per minute.	Baseline visit, 7th visit(7 weeks after BL), 13th visit (13 weeks after BL), 14th visit(9months after BL, which is also 6months after vision therapies )

Collaborators and Investigators

• Sponsor: Sun Yat-sen University
• Investigators: Principal Investigator: Xiang Chen, Ph.D, Zhongshan Ophthalmic Center, Sun Yat-sen University

Study record dates

Study Major Dates

• Study Start: September 1, 2015
• Primary Completion (Anticipated): September 1, 2016
• Study Completion (Anticipated): September 1, 2016

Study Registration Dates

• First Submitted: October 10, 2015
• First Submitted That Met QC Criteria: October 14, 2015
• First Posted (Estimate): October 19, 2015

Study Record Updates

• Last Update Posted (Estimate): October 19, 2015
• Last Update Submitted That Met QC Criteria: October 14, 2015
• Last Verified: October 1, 2015

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Eye Diseases; Refractive Errors; Myopia
• Other Study ID Numbers: 2015ACC