While 80% of pre-presbyopic adults with Digital Eye Strain symptoms preferred reading with low-addition lenses, the improvement in reading speed was generally small and did not appear to correlate with specific accommodation or binocular vision dysfunctions. In the 8% who showed a significant improvement in reading rate of at least 15%, a majority showed reduced accommodation amplitude.
Peripheral vision function and reading speed were unaffected by highly aspherical (HAL) and slightly aspherical lenslet (SAL) spectacle lens designs compared to single vision lenses. Low contrast acuity was slightly reduced through the lenslet zone.
This study evaluated the visual performance and optical quality of three lenslet design spectacle lenses. While all degraded visual performance in some capacity, the concentric design (highly and slightly aspherical) lenses generally had a significantly lower impact on both acuity and contrast than honeycomb configuration (HC).
By using a wearable device to objectively monitor visual behaviour, this study found progression in young myopic children was correlated with less time outdoors, more time working at near for online learning and less time spent wearing their glasses.
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.
Estimates on the lifetime cost of myopia management options have shown that although the financial cost is higher in childhood, the cost of staying with traditional non-treatment single vision options is higher over a lifetime.
This study reports two year results from a randomized clinical trial examining myopia control spectacle lenses with highly aspherical lenslets (HAL) or slightly aspherical lenslets (SAL). The findings showed the HAL lens controlled refractive and axial progression by 50-55% and SAL by around 30% over two years. Read more about the outcomes and comparisons to other myopia control spectacles here.
This systematic review of 9 studies confirms that under-correction of myopia does not slow progression; rather, at least half of the studies have shown the myopia progression is accelerated. There was no benefit found in overcorrection, and the evidence for un-correction was equivocal. Clinically, this advocates for the full correction of myopia.
When looking through the ‘treatment zones’ of three different types of myopia controlling spectacle lenses with lenslets, visual acuity is reduced by 3-5 letters and mid-to-high frequency contrast sensitivity is mildly affected compared to single vision spectacles. We’re yet to learn if small differences between designs may influence patient preference.
Children who had already participated in the two-year clinical trial either continued wearing DIMS or switched from the control SV to DIMS. Comparison to an age-matched historical control group showed a myopia control effect in the third year.
