Power Profiles of an extended depth of focus contact lens for Myopia Management: Power profiles of an EDOF contact lens for myopia management

Authors

• Annabelle Mawhinney, School of Health Professions
• Phillip Buckhurst, School of Health Professions
• Craig McNeile, School of Engineering, Computing and Mathematics
• Stephen Hall, School of Psychology
• Hetal Buckhurst, School of Health Professions

ORCID

• Phillip Buckhurst: 0000-0001-6037-0597
• Craig McNeile: 0000-0003-0305-2028
• Stephen Hall: 0000-0002-9274-6867
• Hetal Buckhurst: 0000-0002-8203-7979

Abstract

Purpose: To characterise the optical power profiles of an extended depth of focus (EDOF) contact lens (MYLO, Mark’ennovy) for myopia management across its full range of labelled powers and fitting parameters.Methods: Power profiles of 91 MYLO lenses were measured using the NIMOevo® instrument. Lenses ranged in labelled power from –1.00 to –10.00 D, total diameters (TD) from 13.50 to 15.50 mm and back optic zone radii (BOZR) from 7.1 to 9.8 mm. Central thickness (CT) was assessed using spectral-domain optical coherence tomography. Lens power profiles were fitted with piecewise cubic splines, and peaks and troughs were identified using both semi- and fully automated inflection point detection. Zernike polynomial fitting, applied at enhanced resolution, was used to derive power within the central 0.50 mm radius.Results: All lenses demonstrated a damped sine-wave power profile, featuring three consistent peaks and troughs superimposed on a general trend toward peripheral minus power. The location and relative magnitude of these features remained highly consistent across all combinations of lens power, TD and BOZR. Central zone analysis revealed a mean relative hyperopic defocus of 1.24 ± 0.79 D within the central 0.25 mm radius, followed by a myopic shift of 0.41 ± 0.38 D in the 0.25 - 0.50 mm annulus, resulting in a near-emmetropic outcome (0.08 ± 0.38 D) across the full central 0.00 - 0.50 mm region. CT was not correlated with labelled power.Conclusions: The MYLO lens demonstrated a stable and predictable optical profile across a broad range of fitting parameters, indicating that changes in lens power or parameter do not impact its optical performance. The study highlights the need for refined standards in the evaluation of power profiles of EDOF CLs.

DOI Link

10.1007/s44402-026-00070-y

Publication Date

2026-04-02

Publication Title

Ophthalmic and Physiological Optics

ISSN

0275-5408

Acceptance Date

2026-03-13

Deposit Date

2026-03-13

Embargo Period

2027-04-02

Keywords

contact lenses, extended depth of focus, myopia, myopia management, power profiles

Recommended Citation

Mawhinney, A., Buckhurst, P., McNeile, C., Hall, S., & Buckhurst, H. (2026) 'Power Profiles of an extended depth of focus contact lens for Myopia Management: Power profiles of an EDOF contact lens for myopia management', Ophthalmic and Physiological Optics, . Available at: 10.1007/s44402-026-00070-y