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First, moving questions rewards people for asking in the wrong place.  That's not something that should be encouraged.

Second, that's not a great question because it requires following links to get pertinent points.  Information necessary for understanding a question must be in the question itself.

Third, the actual question doesn't make sense.  Premises seem to be<ol>

<li>There are lenses advertised to control myopia in children.

<li>The FDA (US Food and Drug Administration) has not approved these lenses.

</ol>

The question then asks how these lenses can work for adults too.

The fact that the FDA hasn't approve the existing lenses even for children casts doubts on whether they work at all.  In any case, all seem to agree that they don't work on adults, so asking how they can doesn't make sense.  They don't.

The OP could possibly have asked by what mechanism these lenses seem to work, and why those don't apply to adults, but that's not what was asked.

It's not our job to fix messes.  We close and move on.  Doing anything else only encourages more messes.