Myopia Control Combined PBM With Myopic Defocus Lens in Children

Condition(s) studied

Investigational drug(s) / intervention(s)

PBM: PBM, is a low intensity red light at wavelength of 650nm; Peripheral defocus spectacels is a peripheral design glasseses for correct myopia and control myopia

Peripheral defocus spectacles: plus power design of many peripheral small lenses to achieve myopic defocus of the retina in the peripheral retina

Single vision spectacles: Distance vision correction with the single vision spectacles for the myopia correction methods (glasseses for myopia correction)

Study summary

To study the efficacy of myopi control with two methods: low lever red light and peripheral defocus spectacles with four groups and design with prospective, double-blind, randimized, and with control for 6 month.

Eligibility

Primary outcome measure(s)

• axial length (mm) — 6 month
  Axial length changes at follow-up of 6 month from baseline will be measured by IOLmaster 500 at the same site by the same examiner with the mean values of 5 times measurements at either time. Changes in axial length (mm) without cycloplegia are to be measured by IOLmaster(Carl Zeiss). Five measurements will be taken and then averaged.
• SE (Diopter, D) — 6 month
  changes of cycloplegic spherical equivalent from baseline will be measured under cycloplegic refraction by autorefractor. Five measured by the same autorefractor are to be obtained for each eye.

Trial sites (1)

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