Pediatric Myopia Control, Defocus Optics & Axial Length Metrology
• 14 min read
DIMS vs. H.A.L.T. Technology: Clinical Evidence for Slowing Pediatric Myopia Progression
EXECUTIVE CLINICAL SUMMARY
Childhood myopia has reached epidemic proportions globally, accelerating dramatically across urban India where over 35% of school-going children now require minus lenses. Until recently, eye doctors had no choice but to prescribe standard single-vision lenses, watching helplessly as children's prescriptions increased by -0.75 D to -1.50 D every single year. Today, ophthalmic science has been transformed by revolutionary peripheral defocus technologies: Defocus Incorporated Multiple Segments (DIMS, found in Hoya MiYOSMART) and Highly Aspherical Lenslet Target (H.A.L.T., found in Essilor Stellest). Long-term clinical trials published in the British Journal of Ophthalmology demonstrate that these lenses slow myopia progression and axial elongation by an astonishing 50% to 67%. We examine the optical engineering, micro-lenslet physics, and clinical trial outcomes.
ELLASUV Clinical Metrology Laboratory
Pediatric Physiological Optics & Myopia Management Division
ISO 8980-3 / ANSI Z80.1 Metrology
•
Updated: 2026-09-07
•
✓ Peer-Reviewed
The Engineering Breakthrough: Dual-Zone Simultaneous Focus
A standard single-vision lens focuses central light rays onto the fovea, but due to the prolate (egg-shaped) geometry of the myopic eye, peripheral light rays focus behind the retina (Peripheral Hyperopic Defocus). This optical signal tricks the sclera into growing longer, accelerating axial elongation.
Myopia control lenses solve this with a dual-optical architecture:
- Central Clear Optical Zone (approx. 9mm to 11mm): Delivers crisp 6/6 distance vision through standard single-vision refractive correction.
- Peripheral Lenslet Treatment Ring (approx. 33mm): Embedded with hundreds of microscopic contiguous or concentric lenslets delivering of relative myopic defocus in front of the peripheral retina.
DIMS (MiYOSMART) vs. H.A.L.T. (Stellest): Metrology & Design
While both technologies aim to induce peripheral myopic defocus, their optical geometries differ fundamentally:
- DIMS Technology (Hoya MiYOSMART): Utilizes a honeycomb matrix of 396 identical spherical micro-lenslets, each measuring 1.03 mm in diameter with a constant power of .
- H.A.L.T. Technology (Essilor Stellest): Utilizes 1,021 contiguous aspherical lenslets arranged in 11 concentric rings. The power of the aspherical lenslets varies progressively, creating a 3D volumetric 'cushion of light' that slows elongation regardless of eye rotation angle.
Clinical Trial Evidence: 2-Year & 6-Year Longitudinal Data
In rigorous randomized controlled clinical trials:
Children wearing defocus lenses full-time () showed virtually zero abnormal axial elongation compared to age-matched controls wearing standard single-vision glasses.
RECOMMENDED CLINICAL OPTIC
Explore BluePro Sharp Focus 1.60 Ultra-Thin
Precision-engineered optical coatings featuring multi-layer dielectric anti-reflection, selective spectral absorption, and ±0.01D prescription tolerances.
FREQUENTLY ASKED CLINICAL QUESTIONS
Expert Answers
Can special glasses really stop my child's eyesight number from increasing? ▼
Yes! Clinical trials have proven that Defocus Incorporated Multiple Segments (DIMS) and H.A.L.T. lenses slow down childhood myopia progression and eyeball growth by 60% compared to standard glasses.
What is the difference between DIMS and standard glasses? ▼
Standard glasses only correct vision in the center while letting edge rays focus behind the retina, which causes the eyeball to grow longer. DIMS lenses create a protective ring of defocus that signals the eyeball to stop stretching.
At what age can a child start wearing myopia control lenses? ▼
Children can begin wearing defocus lenses as young as 6 to 8 years old, as soon as progressive myopia (a prescription that worsens by -0.50 D or more per year) is clinically identified.
#axial length shortening pediatric myopia lenses
#cost of myopia control glasses in india miyosmart stellest
#dims technology lenses myopia control children
#dims technology miyosmart stellest myopia control
#ellasuv dims technology miyosmart stellest myopia control
#ellasuv myoshield pediatric defocus lenses
#ellasuv optical lenses
#halt technology highly aspherical lenslet target
#how to stop child eyesight number from increasing
#hoya miyosmart vs essilor stellest comparison
#myopia control spectacle lenses clinical trials 60 percent
#pediatric ophthalmology myopia management guidelines
#peripheral myopic defocus lenslet array optics
#polycarbonate impact safety for children glasses
#why standard single vision glasses increase myopia