Hi sha256,
You mention that you have been using +2 diopter lenses for 3 years to slow myopia, but that you have not been able to reverse it. In what way have you been using the plus lenses? Just wearing them around the house or office all the time will not provide much or any benefit. You will only begin to reverse your myopia if practice "threshold focusing" -- focusing on print or other objects at the edge of your focal range. If you read through the thread on "Eyesight without glasses" and search for my discussion regarding the distances D1, D2 and D3, then you will understand what I am talking about.
In fact, the same progress can be made without using plus lenses at all. The key is to sit just far enough away from your book, computer, TV, or slideshow that you can just begin to see a slight blur in the letters or edges of objects. Then allow your vision to "clear" -- the print or edges will become crisper. Periodically push back to generate a little blur, then let things clear again. If you read or view this way for 30 minutes a day, you will start to make progress.
But if you just wear those +2 lenses and work at the computer with the print totally in focus all the time, don't expect much progress, if any. My guess is that you have been sitting too close to the computer for your plus lenses to do any work. Try sitting farther away to generate a blur. If that is not practical, i.e., if you must sit more than 20 inches away, then get yourself some stronger plus lenses -- perhaps +2.5 or +3. Go to the pharmacy and pick out a pair that just starts to generate a blur for text that is 16-20 inches away from your nose.
Wearing plus lenses without threshold focusing is like trying to build muscles by lifting weights that are either too light or too heavy. Organs such as the eye or muscles will develop only when provided with a stimulus that is right at the eduge of their ability. You might call it the Goldilocks principle: the stimulus must be just right -- not too easy or too difficult. I think it probably applies to our minds also!
Good luck,
Todd