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Long-term axial elongation in myopic children wearing DIMS spectacle lenses: an 8-to-10-year observational study.

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Related Experiment Video

Updated: Jul 25, 2025

Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
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Multiple segment spectacle lenses for myopia control. Part 1: Optics.

Hema Radhakrishnan1, Carly Siu Yin Lam2,3, W Neil Charman1

  • 1Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|June 28, 2023
PubMed
Summary

The optics of Hoya MiyoSmart and Essilor Stellest spectacle lenses, designed for myopia control, were analyzed. Both multifocal lenses showed similar effects on retinal imaging, despite minor manufacturing discrepancies.

Keywords:
MiyoSmartStellestmultiple segmentsmyopiamyopia control

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Area of Science:

  • Ophthalmology
  • Optics
  • Biomedical Engineering

Background:

  • Myopia progression is a growing concern in children.
  • Spectacle lenses with multiple segments (MS) are a novel approach to control myopia.
  • Understanding the optical properties of these lenses is crucial for their efficacy.

Purpose of the Study:

  • To compare the optical characteristics of two MS spectacle lenses: Hoya MiyoSmart and Essilor Stellest.
  • To analyze how these lenses affect the optics of the eye and retinal imagery.

Main Methods:

  • Optical evaluation using surface imaging, Twyman-Green interferometry, and focimetry.
  • Measurement of carrier lens power and lenslet characteristics (spatial distribution, power, form).
  • Geometrical optics calculations to predict the impact on ocular optics.

Main Results:

  • Manufactured MS lenses generally matched design specifications, with minor discrepancies.
  • Lenslet powers were approximately +3.50 D (MiyoSmart) and +4.00 D (Stellest).
  • Both lens types reduce image contrast and create multiple displaced images, with effects varying by pupil size and lenslet configuration.

Conclusions:

  • Hoya MiyoSmart and Essilor Stellest spectacle lenses exhibit broadly similar effects on retinal imagery.
  • The optical performance of these myopia control lenses is consistent despite design variations.