What are some factors that may explain the better efficacy?

please answer this question (In comparison to other spectacle lens designs incorporating peripheral defocus, DIMS (Lam et al., 2019, BJO) were found to be more effective at inhibiting myopisation. What are some factors that may explain the better efficacy?) please see attached file there is some example from another student it may help you to understand and answer the question please do not copy it. and see the attached of the article to help you answer the question.

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