Efficacy of Multi-Type Photolithography Flat Microstructure Lenses for Childhood Myopia Control

NCT07535658 | Not Yet Recruiting

• 1 other identifier: QX-2025-A-021
• Study Type: interventional
• Target: 255
• Locations: 1 country
• Sites: 1

Brief Summary

The goal of this clinical trial is to learn if photolithographic flat microstructure lenses work to prevent myopia in children. It will also learn about the safety of different designs of photolithographic flat microstructure lenses. The main questions it aims to answer are: Are photolithography flat microstructure lenses effective and safe in preventing myopia in children? Does the depth of tinted lenses affect visual quality? Researchers will compare photolithography flat microstructure lenses to a spectacle lenses with aspherical lenslets to see if photolithography flat microstructure lenses works to prevent myopia in children. Participants will: Wear photolithography flat microstructure lenses or Spectacle Lenses with Aspherical Lenslets more than 8H per day for 1 year. Visit the clinic once every 3 months for checkups and tests.

Conditions

Myopia

Outcome Measures

Primary Outcomes (1)

• Use 1% cyclopentolate hydrochloride eye drops (Cyclogyl) for cycloplegia and compare the difference in Sphere equivalent refractive changes over 12 months.

  Computerized refractometer testing, The formula for calculating sphere equivalent power: sphere power + 0.5 \* cylinder power

  From enrollment to the end of treatment at 12 month

Secondary Outcomes (1)

• Difference in 12-month axial length (AL, mm) from baseline

  From enrollment to the end of treatment at 12 month

Study Arms (5)

PPML(multi-point defocus design, non-fading, Nuo Tong)

EXPERIMENTAL

The group wears photolithography plano microstructure lenses （PPML） with a multi-point defocus design, manufactured by Nuo Tong, which feature a non-fading optical property.

Device: wearing photolithography plano microstructure lenses with multi-point defocus design, non-fading optical property

PPML (multi-point defocus design, color, light transmittance 55% after photochromism, Nuo Tong)

EXPERIMENTAL

PPML (Photolithography Plano Microstructure Lenses) incorporates a multi-point defocus optical architecture manufactured by Nuo Tong, featuring photochromic properties with a light transmittance of 55% post-activation.

Device: wearing Photolithography Plano Microstructure Lenses incorporates a multi-point defocus optical architecture , featuring photochromic properties with a light transmittance of 55% post-activation

PPML (multi-point defocus design, color, light transmittance 35% after photochromism, Nuo Tong)

EXPERIMENTAL

PPML (Photolithography Plano Microstructure Lenses) incorporates a multi-point defocus optical architecture manufactured by Nuo Tong, featuring photochromic properties with a light transmittance of 35% post-activation.

Device: wearing Photolithography Plano Microstructure Lenses incorporates a multi-point defocus optical architecture , featuring photochromic properties with a light transmittance of 35% post-activation

PPML (designed to reduce contrast, non-fading, Nuo Tong)

EXPERIMENTAL

PPML (Photolithography Plano Microstructure Lenses), designed by Nuo Tong to reduce contrast sensitivity and featuring a non-fading optical property

Device: wearing Photolithography Plano Microstructure Lenses designed to reduce contrast sensitivity and featuring a non-fading optical property

Plano microstructure lenses (multi-point defocus design，Aspherical Lenslets, Essilor Stellest)

ACTIVE COMPARATOR

Plano microstructure lenses featuring multi-point defocus design with aspherical lenslets (Essilor Stellest)

Device: wearing Plano microstructure lenses featuring multi-point defocus design with aspherical lenslets (Essilor Stellest)

Interventions

wearing Photolithography Plano Microstructure Lenses designed to reduce contrast sensitivity and featuring a non-fading optical property DEVICE

wearing Photolithography Plano Microstructure Lenses designed by Nuo Tong to reduce contrast sensitivity and featuring a non-fading optical property for more than 8 hours

PPML (designed to reduce contrast, non-fading, Nuo Tong)

wearing Photolithography Plano Microstructure Lenses incorporates a multi-point defocus optical architecture , featuring photochromic properties with a light transmittance of 55% post-activation DEVICE

Wearing Photolithography Plano Microstructure Lenses incorporates a multi-point defocus optical architecture manufactured by Nuo Tong, featuring photochromic properties with a light transmittance of 55% post-activation for more than 8 hours.

PPML (multi-point defocus design, color, light transmittance 55% after photochromism, Nuo Tong)

wearing Photolithography Plano Microstructure Lenses incorporates a multi-point defocus optical architecture , featuring photochromic properties with a light transmittance of 35% post-activation DEVICE

Wearing Photolithography Plano Microstructure Lenses incorporates a multi-point defocus optical architecture manufactured by Nuo Tong, featuring photochromic properties with a light transmittance of 35% post-activation for more than 8 hours.

PPML (multi-point defocus design, color, light transmittance 35% after photochromism, Nuo Tong)

wearing photolithography plano microstructure lenses with multi-point defocus design, non-fading optical property DEVICE

wearing photolithography plano microstructure lenses （PPML） with a multi-point defocus design, manufactured by Nuo Tong, which feature a non-fading optical property for more than 8 hours a day.

PPML(multi-point defocus design, non-fading, Nuo Tong)

wearing Plano microstructure lenses featuring multi-point defocus design with aspherical lenslets (Essilor Stellest) DEVICE

wearing plano microstructure lenses featuring multi-point defocus design with aspherical lenslets (Essilor Stellest) for more than 8 hours.

Plano microstructure lenses (multi-point defocus design，Aspherical Lenslets, Essilor Stellest)

Eligibility Criteria

• Age: 6 Years - 8 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17)

You may qualify if:

• Age: 6 years ≤ age ≤ 8 years (calculated based on the informed consent date);
• The spherical equivalent (SE) of both eyes is 0D to +1.00D (inclusive of boundary values) after cycloplegia;
• Astigmatism: Cylindrical power of both eyes ≤ 1.00D;
• Anisometropia: Difference in spherical equivalent between both eyes ≤ 1.00D;
• Corrected visual acuity: Best corrected visual acuity (BCVA) of both eyes ≥ 1.0 (decimal notation, 5m);
• General health status: No systemic syndromes that affect ocular development; no long-term use of growth hormone, corticosteroids, or antiepileptic drugs;
• Previous intervention: No use of any myopia control methods within the past 3 months, including but not limited to: multifocal glasses, atropine eye drops, red light therapy, acupuncture, etc.
• Compliance with spectacle wear: Parents ensure that the child wears glasses for ≥8 hours per day;
• Follow-up capability: Ability to attend scheduled follow-ups for 12 months (4 visits in total);
• Informed consent from guardian: Legal guardian signs the informed consent form; children also sign the assent form.

You may not qualify if:

• History or presence of glaucoma, corneal disease, or other ocular organic disease, or acute or chronic ocular inflammation;
• Combined with systemic major diseases, mental diseases, or systemic collagen metabolism diseases;
• Used any myopia intervention drugs or devices in the past 3 months;
• Those who have participated in other similar clinical studies in the past 3 months;
• Diagnosis of amblyopia, constant strabismus, and other congenital eye diseases;
• Those who are allergic to the lens material or products related to the study;
• Allergy to mydriatic agents and related ophthalmic medications;
• Allergic to photochromic materials or related dyes; taking photosensitizing drugs; suffering from photo-induced skin or neurological disorders;
• Unable to understand the study content or unable to cooperate with the follow-up;
• Other reasons why the research doctor believes the patient is not suitable for the study.

Sponsors & Collaborators

• Shanghai Eye Disease Prevention and Treatment Center: lead

Study Sites (1)

Shanghai Eye Disease Prevention and treatment Center

Shanghai, 200336, China

Location

MeSH Terms

Conditions

Myopia

Condition Hierarchy (Ancestors)

Refractive Errors; Eye Diseases

Central Study Contacts

Qiurong Lin

CONTACT

+8615216698330; LQRoph@163.com

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 1, 2026
• First Posted: April 17, 2026
• Study Start: April 15, 2026
• Primary Completion (Estimated): September 30, 2027
• Study Completion (Estimated): December 31, 2027
• Last Updated: April 17, 2026

Record last verified: 2026-04

Locations

CN (1)