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Updated: Jan 17, 2026

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Myopia control and modulation transfer functions for multisegment spectacle lenses.

W Neil Charman1, David A Atchison2

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

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|September 17, 2025
PubMed
Summary
This summary is machine-generated.

Multisegment (MS) spectacle lenses slow myopia by reducing image contrast through peripheral lenslets. Optimal vision occurs when looking through the clear center, with peripheral viewing limited by low spatial frequencies.

Keywords:
DIMSmodulation transfer functionmultisegmentmyopiamyopia controlspectacles

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Area of Science:

  • Ophthalmology
  • Optical Engineering
  • Vision Science

Background:

  • Multisegment (MS) spectacle lenses are effective in slowing childhood myopia progression.
  • Their mechanism is debated: through-focus effects versus image contrast changes from lenslets.
  • This study investigates the impact of lenslet-induced contrast changes on visual performance.

Purpose of the Study:

  • To model the optical performance of MS lenses combined with a myopic eye.
  • To evaluate the modulation transfer function (MTF) under various viewing conditions.
  • To understand the role of lenslets in visual resolution and potential myopia control.

Main Methods:

  • Utilized Ansys Zemax OpticsStudio for optical system modeling.
  • Simulated distance MTFs for single-vision and Hoya MiyoSmart MS lenses with a 4 D myopic eye model.
  • Assessed visual resolution with co-axial and eccentric viewing through the lenslet periphery.

Main Results:

  • Lenslet arrays reduced modulation transfer compared to single-vision lenses, particularly at higher spatial frequencies.
  • Peripheral viewing (approx. 32.5 degrees) resulted in poor image quality.
  • Foveal image quality was superior with axial viewing through the central clear zone.

Conclusions:

  • Maximal visual resolution with MS lenses is achieved by fixating through the central clear area.
  • Peripheral viewing (20-50 degrees) utilizes lenslets, creating a low-pass filter effect.
  • Myopia control mechanisms likely rely on low spatial frequency information processed through the lenslet periphery.