Effect of Individualized Ocular Refraction Customization Spectacle Lens Wear on Visual Performance in Myopic Chinese Children
ABSTRACT
PURPOSE: This study aimed to compare the visual performance of myopic children wearing individualized ocular refraction customization (IORC) lenses with different amounts of myopic defocus (MD) to determine whether higher MD resulted in greater visual compromise.
METHODS: 184 myopic children aged eight to 12 years participated in the study, with 172 completing the trial. They were randomly assigned to wear IORC lenses with low (IORC-L, 2.50 D), medium (IORC-M, 3.50 D), or high (IORC-H, 4.50 D) MD, or single-vision spectacle lenses (SVL). Visual acuity, contrast sensitivity function, and questionnaires were evaluated at baseline and after six and 12 months.
RESULTS: The study found that visual acuity and contrast sensitivity were not significantly affected by the type of lens worn. The SVL group initially outperformed the IORC lens groups in terms of ghosting images, but this difference was not observed at the six- or 12-month visit. No significant differences were observed among the groups for subjective variables such as vision clarity, stability, eyestrain, dizziness, headache, or overall vision satisfaction.
CONCLUSIONS: The IORC lenses with an actual MD of 4.50 D provided acceptable objective and subjective visual performance and were well tolerated by children.
TRANSLATIONAL RELEVANCE: IORC lenses with an actual MD of 4.50 D provided acceptable visual performance.
