The Defocus Incorporated Multiple Segments (DIMS) clinical study included a two year randomized controlled trial, which then extended to investigate continued efficacy over six years of wear, plus groups who switched from single vision to DIMS and back again. There was no evidence of a rebound effect. Visual acuity and binocular visual functions were similar across groups.
This cross-over study investigated the efficacy of highly aspherical lenslet (HAL) lenses to slow myopic progression for Vietnamese children. Switching from single vision to HAL lenses gave a slowing of myopia progression demonstrated by lesser axial elongation. Switching from HAL to SV did not demonstrate a myopia rebound effect.
This 1-yr extension of a previous 2-yr clinical trial investigated myopia control efficacy of highly aspherical lenslet (HAL) spectacle lenses for children wearing them for a further year and for children switching to HAL after wearing slightly aspherical lenslet (SAL) or single vision lenses. HAL design lenses were able to provide or maintain a myopia slowing effect for all wearers.
This prospective observational study found that DIMS spectacle lenses, atropine 0.01% and the combination of the two all showed robust efficacy for myopia control in European children. The combination treatment showed slightly better refractive control than the mono-therapies, but axial length growth was similar in all treatment groups.
Spectacle lenses for myopia control provide a clear central zone and a ‘treatment’ area for myopic defocus. This study found that atropine 0.01% and glare situations had minimal impacts on visual performance when adults wore the DIMS spectacle lens. This indicates likely tolerance of the combination in children.
The first year data from the ongoing CYPRESS randomized clinical trial show that Diffusion Optics Technology (DOT) spectacle lenses can regulate contrast signals across the retina to reduce myopia progression in children aged 6-10 years, and are safe and effective to wear.
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.
