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Advanced Technology for Myopia Control in Children and Young Adults
Sponsor: University of Faisalabad
Summary
Myopia, or nearsightedness, is increasing rapidly worldwide, especially in children and young adults. This study will test two advanced treatments for slowing myopia progression with one control group: special lenslet spectacles (Stellest with HALT technology) and violet excitation filter glasses (wavelength 420 nm) and Single vision lenses for controls. The study will enroll 90 participants aged 8 to 20 years from schools and universities in Faisalabad, Pakistan. Participants will be randomly assigned to one of three groups: lenslet spectacles, violet filter glasses, or single vision lenses (control group). Visual acuity, contrast sensitivity, Spherical Equivalent and axial length will be measured at the start and again after 3, 6, and 9 months and one follow up after cessation of treatment. The study aims to determine whether these advanced technologies can effectively slow myopia progression compared to standard glasses, providing head-to-head evidence on emerging and established optical interventions for myopia control.
Official title: Role of Advanced Technological Approaches for Myopia Control in Myopic Patients: A Randomized Controlled Trial of Lenslet Spectacles vs. Violet Excitation Filter Glasses vs. Single Vision Lenses
Key Details
Gender
All
Age Range
8 Years - 20 Years
Study Type
INTERVENTIONAL
Enrollment
90
Start Date
2025-07-01
Completion Date
2026-06-06
Last Updated
2026-06-12
Healthy Volunteers
No
Conditions
Interventions
Lenslet Spectacles
The lenslet spectacles are specially designed spectacle lenses featuring HALT (Highly Aspheric Lenslet Target) technology manufactured by Essilor International (Serial Number: 72426930). The lens design includes a clear distance zone in the center with peripheral areas providing single vision correction. Technical specifications: 5H green covering, multi-dimensional pattern, 1.6mm thickness, refractive index 1.56, UV 400nm protection, antireflective coating. Participants are instructed to wear the spectacles throughout all waking hours. Each participant receives a new pair at baseline. No adjustments are made during the 12-month treatment period unless vision changes require prescription update.
Violet Excitation Filter Glasses
The violet excitation filter glasses are prescription glasses incorporating a violet light filter with wavelength 420 nm (range 360-420 nm). Material: CR-39. Filter intensity: 700 nm. Wavelength verified using spectrophotometer (standard error ±0.1 to 1 nm). Participants are instructed to wear the glasses for 3 hours daily, specifically from 11 AM to 2 PM, to optimize impact on circadian rhythm while avoiding disruption of sleep patterns. Each participant receives a new pair at baseline. The filter is integrated into the prescription lenses.
Single Vision Lenses
Standard single vision spectacle lenses (SVS index 1.56) with no myopia control features. These are conventional prescription glasses that correct refractive error but do not incorporate lenslet technology or violet filtering. Participants are instructed to wear the glasses throughout all waking hours. Each participant receives a new pair at baseline.
Locations (1)
The University of Faisalabad
Faisalābad, Punjab Province, Pakistan