Optical design matters
The glasses correct the focus, and the selected designs tested additionally modify the distribution of the optical stimulus in order to slow down the growth of the eye. Not every lens described as "myopic" is a progression control lens.
DIMS and aspherical microlens designs create a defined defocus distribution outside the clear vision area. Design differences are part of the intervention, not just the trade name.
The history includes earlier multifocal approaches and the more recent DIMS and HAL /SAL studies. The registry shows each construct and its control group separately.
Go to full timelineIn the DIMS RCT, the average axis extension over the 2 years was 0,21 mm compared to 0,55 mm with single vision lenses.
Study of the specific design of DIMS ; 160 children completed follow-up. Online 2019, volume of 2020 magazine. It does not prove that all defocus glasses work.
Publication, Authors and RestrictionsTesting of spectacle lenses with aspherical microlenses showed inhibition of progression for the HAL design compared to single vision lenses.
Product and design-dependent result; is not a direct comparison of HAL with DIMS.
Publication, Authors and RestrictionsThe review is not a substitute for checking a specific intervention. The publication date and query end date may vary.
IMI 2025 organizes optical, pharmacological, environmental and lighting strategies and the state of research on their effects.
Mature technologies and emerging methods have a different evidence base. The inspection is not an individual clinical eligibility assessment of the child.
Publication, Authors and RestrictionsThe two-year RCT DIMS and HAL is a clearly defined follow-up period. Longer extensions may add additional information, but group switching and participant loss limit comparison with the baseline RCT.
The rating includes sharpness, image tolerance, fit and way of wearing. Good results from one design do not guarantee identical comfort and effect from another.
We do not rank DIMS versus HAL from two separate RCTs. Age, baseline defect, control group, and wear time may vary between works.
They are one of the optical options considered for children with progression. The choice of design requires an assessment of the defect, binocular vision, tolerance and real wearability.
This is a framework for a conversation with a specialist, not an individual treatment plan.
ESO and IMI present a framework for the selection of management, prevention and monitoring of myopia progression.
The guidelines require reference to current knowledge, local availability and the specific patient.
Publication, Authors and Restrictions