Effect of Light-Blocking Lenses on Pediatric Hyperopia

A Prospective Randomized Controlled Trial on the Effect of Light-Blocking Lenses on Emmetropization in Hyperopic Children

This study aims to assess the efficacy of light-blocking lenses in facilitating emmetropization in children with hyperopia and to explore their influence on various aspects of visual function.

Inclusion Criteria:

• Aged 6 years or older and 12 years or younger;
• Spherical refractive error in both eyes between +3.0 D and +7.5 D, cylindrical refractive error between -2.0 D and 0 D; interocular difference in spherical power less than 1.5 D and in cylindrical power no greater than 1.0 D;
• Best-corrected visual acuity of 0.0 logMAR or better in both eyes;
• Ocular deviation with spectacles less than 10 prism diopters;
• Has been wearing standard single-vision spectacles regularly for more than six months;
• In good general health, capable of receiving the study intervention, and willing to comply with the study protocol;
• Written informed consent obtained from both the parent/guardian and the child, with agreement to comply with all study procedures and maintain follow-up availability throughout the study period;

Exclusion Criteria:

• History of ocular trauma or eye surgery;
• Presence of pathological abnormalities on anterior or posterior segment examination, or a history of organic ocular diseases such as cataract, glaucoma, corneal disease, or fundus disorders;
• Intraocular pressure greater than 21 mmHg;
• Presence of systemic diseases or other conditions deemed unsuitable for study participation;
• Any other condition deemed inappropriate for participation in the clinical trial by the investigator;