Hi Alex, I have not found the studies in the PDF.
Hi FonkStreet,
in the myopia manual January edition,
page 81 in the book (93 in the pdf automatic numeration)
"In other words, plus lenses were working in the opposite direction as excessive accommodation or
negative lenses, as long as their power did not exceed a certain threshold."
"Results of by Metiapally and McBrien showed191: "Constant +4 D lens wear produced
+6.9 D relative hyperopia, while +6 and +9.5 D lens wear did not induce hyperopia"
page 82
"c) A positive replacement lens (+ 3, + 4, + 5 D) resulted in about half of the cases in myopia,
in the other half myopia was prevented. The + 6 D and the + 10 D lenses, however, were
ineffective in blocking the myopia."
page 92
"Excessive use of plus lenses, however, which results in a degraded image quality results often in
the onset or the progression of myopia (result c)).
Note:
Obviously, it depends on the duration and the strength of accommodation, and the duration and
extent of degraded image quality.
Therefore people who are most of the day doing near work with plus lenses or plus additions
which still give them a perfect image should not be at great risk by the occasionally reduced image
quality at distant vision with these plus glasses or plus additions. In this case, there would be no
excessive accommodation, and only a short time of reduced image quality."page 53
"Ophthalmologist Viikari summarizes her lifelong experience by the recommendation of additions
of even as high as + 3.0 D"