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Start Retinal Defocus Training ONLY after having trained ocular muscles for some time

FAQ n. 34. Power Vision System - Before starting to do the exercises, I have a few questions. Am I supposed to start training with focusing after having trained my ocular muscles for some time (days? weeks? months?) or should I start doing both at the same time? I wear correcting glasses for myopes with 4.5 D lens on my right eye and 4.0 D on the left one.

In a training session without my glasses (I hold a book at about a 12-inch distance), only my less myopic eye (the left one) works. Should I train with focusing, putting additional positive lenses over my correcting glasses so as to make both my eyes work, or should I train without my glasses, blindfolding my right eye till it reaches the same level of myopia as my left eye?

- Answers David De Angelis

Every myopic person has stiff and inflexible extrinsic ocular muscles, due either to misusing or not using them. Misuse means both abuse in wearing glasses (for example, at near distance where adjustment is possible even without lenses) and wearing glasses when you don’t really need them at all, in “safe” places—at your home.

“Preliminary” work—before starting training with retinal defocus—with or without lenses is needed, because those stiff and poorly flexible muscles penalize all your work with retinal defocus, jeopardizing your improvements. Purely “muscular” preliminary work (the active stretching as described in PVS) allows you to have better results in training with retinal defocus since the muscles become more able to relax and focus.

Another great advantage of the preliminary work is the result of restoring the right ocular muscles’ symmetry: correcting “wrong” positions that over time will lead to adaptations of the ocular muscles, which may even lose their symmetry (equal relationship between strength/flexibility of all six ocular muscles). The quality of adjustment depends additionally on the capability of central fixation/centralization (the capability of adjusting or “pointing” the image on the central fovea). This work is aimed at restoring the capability of centralization/central fixation and better muscular symmetry. This can give only “visible” advantages, above all when focusing in the presence of retinal defocus (carrying out the second phase of the PVS program).

Even though the retinal defocus technique isn’t widespread, it would be wrong to state that it doesn’t exist or that it is inefficient. Your eyes will show it to you after you have carried out the specific training with retinal defocus for some time.

When should you start working with retinal defocus? The very same rule of common sense works here: always follow the principle of retinal defocus.

There’s no standard time before starting to train with defocus. However, you should start with the first phase of PVS, carrying out active stretching with your oculomotor muscles and making them work at a maximum range of the visual field.

I advise you to work, at first, with retinal defocus on your “weaker” eye. You can do it by blindfolding your “better” eye and training with retinal defocus on the other eye until both eyes are at an equal refractive level. At that time you can start working with retinal defocus with both eyes.


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