technology takes this a step further by introducing the concept of a 'volume of myopic defocus'. The DIMS technology works on the concept of creating simultaneous defocus, during both distance and near viewing - one plane on the retina due to the single vision zone(s) of the lens, and one plane creating myopic defocus due to the +3.50D defocus lenslets. To learn more about this, start by reading the introduction in this December 2020 paper, here. how far into the periphery) and how much defocus difference is required. The latest research on this in animal models, again by Earl Smith and colleagues, has sought to understand where on the retina (eg. Think of this as two planes of focus - one being on the retina to correct myopia, and the other in front of the retina for myopic defocus - which could be anywhere across the retina and not just in the 'periphery'. The more recent thought has evolved to the simultaneous myopic retinal defocus theory. This has been shown in animal models - Earl Smith III is arguably the world's leading researcher in this area and you can read a summary lecture of his from 2010, here. When it comes to the theories of myopia control mechanisms, the long standing contender is the peripheral defocus theory, whereby the peripheral retina receives myopic defocus as a slow-down or stop signal for eye growth. Let's go further to understand DIMS and H.A.L.T. Perhaps this is why their myopia control efficacy results are seeming to exceed any of the previous spectacle lens solutions, and equaling that of dual focus soft and orthokeratology contact lenses. While of course an eye moves behind a spectacle lens, these new lenses can be thought of as 'behaving more like a myopia controlling contact lens' because when the child looks away from the clear central zone, they are receiving simultaneous in-focus information from the single vision distance correction (falling on the retinal plane) and myopic defocus information (falling somewhere in front of the retinal plane).
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