Functional Vision affecting on the myopia progression
The study below highlights the importance of conducting thorough testing of binocular vision function to better understand the triggers of myopia. This is why we always emphasize the need for functional vision and vision development assessments.
Abstract
Purpose
To investigate the impact of vergence dysfunction on myopia progression in children with Defocus incorporated multiple segments (DIMS) spectacle lenses.
Patients and Methods
We retrospectively enrolled children prescribed DIMS spectacle lenses to slow myopic progression. Baseline vergence dysfunction was determined according to phoria at distance and near. Axial length (AL) measurement and cycloplegic subjective refraction were performed before fitting the lenses and at six-month and one-year follow-ups. The six-month and one-year AL and spherical equivalent (SE) change from baseline were calculated and compared in subgroups stratified with the type of vergence dysfunction.
Results
Two hundred and ninety-two myopic children were included. Significant AL elongation and SE progression were observed at six months and one year (P < 0.05 for all comparisons). Multiple regression demonstrated that AL elongation at six months (P < 0.001) and one year (P < 0.001) was negatively correlated with age, and SE progression at six months was associated with age (P = 0.002). The AL elongation at six months in children with convergence excess was significantly greater than in normal myopic subjects (P = 0.011) and subjects with convergence insufficiency (P = 0.008), divergence excess (P = 0.007), divergence insufficiency (P = 0.024) and basic esophoria (P = 0.048) at six months.
Conclusion
The present research demonstrated that vergence dysfunction influences myopia progression for myopic children with DIMS, and the children with convergence excess suffer from the greatest myopia progression among different types of vergence dysfunction.
Ma, J., Yang, X., Liu, Z., Fu, H., Fan, S., Wang, K., Li, Y., Huang, L., & Zhao, M. (2024). The impact of vergence dysfunction on myopia control in children wearing defocus spectacle lenses. Clinical Ophthalmology, 18, 799–807. https://doi.org/10.2147/OPTH.S453731