The influence of high addition soft multifocal contact lenses on visual performance

Computerised dynamic posturography for postural control assessment in subjects wearing multifocal contact lenses dedicated for myopia control

“…Similarly, in young adults, bifocal and multifocal lenses had no influence on body sway when measured on a static platform, independent of the power of lenses used 39 . As demonstrated in our previous studies, 5,16 as well as other research on MFCLs, 3–4,15 visual signals are distorted by MFCLs, so that a reduction in body control was expected. The dynamic condition used in the current study was closer to walking than a static condition.…”

“…Recently, we found that MFCLs with high addition powers (+2 D and +4 D) designed for myopia control (Relax, SwissLens) significantly reduced peripheral contrast sensitivity, during both discrimination 16 and detection 5 tasks. Moreover, that particular lens decreased the accommodative response, which resulted in greater exophoria, but this effect was significant only for the +2 addition, and not with the +4 D addition power 5 . It could be argued these changes in the accommodative response and convergence posture produced by the MFCLs, as well as the decrease in the quality of central and peripheral vision, may disturb everyday visuo‐motor functions dependent on visual signals such as body balance control 17–19 .…”

“…Multifocal (MFCL) or bifocal contact lenses are an effective optical method to control myopia progression in children, 1 while producing relative good quality vision at all distances. [2][3][4][5] With these particular types of lenses, centre-distance designs are usually recommended, whereby refractive error is corrected by the central zone, while the positive additional power located in the periphery of the lens may reduce off-axis relative hyperopic defocus. 6 The latter is currently believed to be one of the main causes of axial elongation and myopia progression.…”

“…3,15 However, no such impairment was found with aspheric MFCLs (PureVision) 15 or with concentric bifocal contact lenses (Dual Focus). 2 Recently, we found that MFCLs with high addition powers (+2 D and +4 D) designed for myopia control (Relax, SwissLens) significantly reduced peripheral contrast sensitivity, during both discrimination 16 and detection 5 tasks. Moreover, that particular lens decreased the accommodative response, which resulted in greater exophoria, but this effect was significant only for the +2 addition, and not with the +4 D addition power.…”

Evaluating the Effect of Topical Atropine Use for Myopia Control on Intraocular Pressure by Using Machine Learning

“…According to the Ministry of Health and Welfare of Taiwan, more than 80% of all school children develop myopia by the end of high school in Taiwan [ 5 ]. Since the increase in myopia cases is a worldwide trend, there are many effective mechanisms to control myopia progression such as atropine [ 4 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], orthokeratology [ 19 , 20 ], experimental bifocal/multifocal soft contact lenses (CLs) [ 21 , 22 ], commercial bifocal or multifocal soft CLs dedicated to presbyopia corrections but used for myopia control [ 23 , 24 ], and commercial multifocal CLs specially dedicated to myopia control [ 25 , 26 ]. Atropine, an anticholinergic blocking agent, can temporarily paralyze the smooth ciliary muscle causing cycloplegia.…”