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.
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;
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;