This study examines the effect that dual focus contact lenses have on accommodation and defocus during near viewing, and the results provide clues towards understanding the myopia control mechanism of these contact lenses.
This cross-over study investigated children wearing highly aspherical lenslet (HAL) spectacle lenses versus single vision spectacles over three six-month periods. The HAL lenses showed consistent myopia control efficacy and no rebound effect when discontinued over one of the six-month periods.
This abstract reported on the association between myopia and dry eye disease in teenagers. Interestingly, dry eye disease and reduced break up time was associated with higher myopia, but photophobia and pain were not.
Nightly use of atropine 0.01% was able to reduce myopia progression and axial elongation for Chinese children over 9 months. However, this study also found that refractive astigmatism may increase within the first 3 months of treatment as a result.
Teenagers in the Netherlands were able to spend time outdoors during the COVID pandemic but still significantly increased near work on digital devices.. This is expected to give an increase in myopia prevalence and progression in European teens but to a lesser extent than in Asia where there was restricted outdoor time with stricter lockdown.
Low-dose atropine (0.05% or less) has a maximum effect on pupil size for both bright and dim light conditions within an hour of instillation, but has little to no effect on binocular vision in myopic children when used for myopia management.
This is the first meta-analysis to directly compare mean axial growth across studies, looking at how age and ethnicity contribute to differences. Current axial length growth charts differentiate by sex and ethnicity, with age being the key variable. The results indicate that mean annual axial length growth is 28% greater in Asian compared to non-Asian children., reaffirming the need for Asian-specific data.
Different designs of soft myopia control contact lenses have different impacts on the accommodation response, sitting alongside previous research which relates this to efficacy. The measurement technique used for accommodation also influences the outcomes.
Increasing power in a myopia control treatment zone of a multifocal soft contact lens can increase myopia control efficacy but negatively impact vision. This study is the first optical characterization of a novel design to improve this relationship between treatment zone power and vision quality.
With increasing use of axial length to monitor myopia progression, the ratio of refractive error change to axial elongation has important clinical implications. This systematic review determines this ratio and explores factors that influence it.
