Assessment of Accommodation Behavior in Children Under Myopia Control Treatment (Pilot Study)

This study will examine the accommodative behavior in children undergoing myopia control treatments. A subset of children showing reduced accommodation, known to occur in while wearing multifocal soft contact lenses (MFCL) from previous studies, will undergo auditory biofeedback training to improve the accommodative response and possibly improve treatment efficacy. The results of this study will be used to design a larger clinical trial.

Aim 1 - The accommodation response in myopic children being treated with MFCL for six months or longer, will be determined. The accommodative response data will be collected while the patients are wearing the MFCL and will be compared to the baseline control response when the subjects wear single vision soft contact lenses (SVCL). Additional comparisons will include accommodative measures in untreated myopic children wearing spectacle corrections (unttreated controls), children being treated with ortho-keratology contact lenses, and children treated with low-dose atropine (0.01%, considered not to affect accommodation). How these additional myopia treatments affect the accommodation response has yet to be determined.

Aim 2 - Children treated with MFCL who show reduced accommodative responses will undergo a brief period of auditory biofeedback accommodative training to determine whether the response in children can be improved and how long it can be sustained. Improving the accommodative response in these patients may improve the treatment efficacy by increasing the effect of the positive power addition built into the lenses.

Study Overview

• Status: Completed
• Conditions: Myopia; Accomodation; Biofeedback Training
• Intervention / Treatment: Behavioral: Auditory biofeedback traing

• Study Type: Observational
• Enrollment (Actual): 44

Contacts and Locations

Study Locations

• United States
  • New York
    • Long Beach, New York, United States, 11561
      • State University of New York, College of Optometry

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 8 years to 15 years (Child)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

Pediatric population

Description

Inclusion Criteria:

• Best corrected monocular Snellen visual acuity (VA) ≧ 20/25
• Age 8 - 15 years
• Refractive error spherical equivalent between -0.75 D and -10 D
• Astigmatism ≤ 0.75 D
• Age-appropriate amplitude of accommodation
• No suspected or confirmed eye disease (anamnesis)
• No accommodative or binocular function abnormalities
• Agreement to participate in the study (informed consent of parents, assent of child)
• Children who are currently under myopia control treatment should already be so for ≥ 6 months

Exclusion Criteria:

• Persons who are incapable of giving consent
• Refractive error spherical equivalent < -10 D and > -0.75 D
• Astigmatism > 0.75 D
• Abnormal binocular functions
• Medication affecting accommodative response or causing dry eye

Study Plan

How is the study designed?

Design Details

• Observational Models: Case-Control
• Time Perspectives: Other

Number of groups / cohorts

4

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
(1) Multifocal soft contact lenses (MFCLs); Assess accommodative function of myopic children wearing MFCLs for myopia control treatment. Accommodative stimulus-response functions and accommodative lags will be determined during one, one hour measurement session for four stimulus distances using an IR video refractometer (PowerRefractor). MFCL subjects will also be tested while wearing SVCL distance corrections for comparison.	Behavioral: Auditory biofeedback traing; Subjects who wear MFCLs for myopia control will receive one episode of auditory biofeedback training, and their accommodative responses to various demands (0, 2.5, 3, and 4 D) before and after the training were measured using a power refractor.
(2) orthokeratology; Assess accommodative function of myopic children wearing Orthokeratology for myopia control treatment.
(3) low-dose atropine; Assess accommodative function of myopic children using low-dose atropine eye drops for myopia control treatment.
(4) single vision spectacle correction (control); Assess accommodative function of myopic children wearing single vision spectacle lenses.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Accommodation	Subjects' accommodative response will be measured using a power refractor	Within 4 weeks

Collaborators and Investigators

• Sponsor: State University of New York College of Optometry
• Collaborators: University Hospital Tuebingen
• Investigators: Study Director: Stewart Bloomfield, PhD, State University of New York College of Optometry

Study record dates

Study Major Dates

• Study Start (Actual): December 1, 2020
• Primary Completion (Actual): December 12, 2022
• Study Completion (Actual): December 12, 2022

Study Registration Dates

• First Submitted: March 17, 2021
• First Submitted That Met QC Criteria: March 17, 2021
• First Posted (Actual): March 19, 2021

Study Record Updates

• Last Update Posted (Actual): January 4, 2023
• Last Update Submitted That Met QC Criteria: January 1, 2023
• Last Verified: January 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Eye Diseases; Refractive Errors; Myopia
• Other Study ID Numbers: IRBNET ID 1525840

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No