Safety and Efficacy Study of 0.5%, 0.1% & 0.01% Atropine Treatment to Both Eyes In Treatment of Myopia In Children

Singapore National Eye Centre400 enrolled

Overview

The purpose of this study is to find an optimal dose of atropine for preventing the rapid progression of myopia in children by comparing the efficacy, safety and functional impact of binocular treatment with 0.5%, 0.1% and 0.01% atropine and to develop a treatment regimen for the routine management of childhood myopia.

A Randomised, Double-Masked Study to Compare The Safety and Efficacy of Bilateral 0.5%, 0.1% \& 0.01% Atropine Treatment In Controlling Progression of Myopia In Children Study Duration and Visit Schedule Total of 5 years with 15 scheduled visits. 1. Phase I: 2 years with 8 scheduled visits 2. Phase II: 3 years with 7 scheduled visits STUDY DESIGN This study consists of 2 phases, each with a different design. Phase I is a double-masked single-centre clinical trial wherein 400 children aged 6-12 years, with myopia of -2.00 D or worse in each eye, and from whom assent and parental/guardian consent have been obtained, will be randomised to receive 0.5% atropine, 0.1% atropine or 0.01% atropine once nightly in both eyes. Participants will be assigned to treatment in the ratio of 2:2:1, respectively. Each child will receive treatment for a period of 2 years during which they will be reviewed every 4 months. Phase II is an open-label study wherein all children will continue to be followed-up regularly for changes in their refractive error after stopping atropine treatment. Those children who demonstrate myopia progression of -0.5 D or more, at least on one eye after a minimum of 8 months washout period will restart atropine treatment in both eyes. The appropriate dose will be determined by analysis of the data from Phase I of the study. Treatment will be for a further 2 years and all children, including those not receiving treatment, will be reviewed every 6 months.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

DOUBLE

Enrollment

400

Conditions

Myopia

Interventions

Atropine Eye dropsDRUG

Eligibility

Sex: ALLMin age: 6 YearsMax age: 12 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Written Informed Consent from parent and assent from child has been obtained 2. Children aged 6 to 12 years 3. Refractive error of spherical equivalent -2.00 D or worse in each eye as measured by cycloplegic autorefraction 4. Active myopia progression of at least spherical equivalent -0.50 D over the last 12 months as determined or suggested by refractive records or change in lens power 5. Astigmatism of less than or equal to -1.50 D as measured by cycloplegic or non-cycloplegic autorefraction 6. Distance vision correctable to logMAR 0.2 or better in both eyes 7. A difference between non-cycloplegic subjective spherical refraction and cycloplegic subjective spherical refraction of not greater than -1.00 D 8. Normal intraocular pressure of not greater than 21 mmHg 9. Normal ocular health other than myopia 10. In good general health with no history of cardiac or significant respiratory diseases 11. No asthma-requiring medications in the past one year 12. No allergy to atropine, cyclopentolate, proparacaine and benzalkonium chloride 13. Willing and able to comply with scheduled visits and other study procedures Exclusion Criteria: 1. Ocular or systemic diseases which may affect vision or refractive error 2. Any ocular condition wherein topical atropine is contraindicated 3. Defective binocular function or stereopsis 4. Amblyopia or manifest strabismus including intermittent tropia 5. Previous or current use of atropine or pirenzepine 6. Any other conditions precluding adherence to the protocol including unwillingness to refrain from contact lens wear for the duration of the study

Locations (1)

Singapore Eye Research Institute

Singapore, Singapore

Outcomes

Primary Outcomes

Spherical equivalent refraction determined by cycloplegic autorefraction

Secondary Outcomes

Axial length determined by non-contact partial coherence interferometry

Ocular symptoms

Induced cycloplegia assessed by near acuity and amplitude of accommodation tests

Pupil reactivity and diameter assessment

Ocular surface and anterior segment changes assessed by slit-lamp and intraocular pressure assessed by non-contact tonometry

Posterior segment changes assessed by fundus photography and ophthalmoscopy

Retinal function assessed by distance acuity test and electroretinography

Data from ClinicalTrials.gov

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