I don't know for sure, but I think any improvement, or worsening, in your eyesight is only temporary. I have clearer vision after a flush, and then, as other stones move in to take the place of the ones that were flushed, my eyesight reverts back to the way it was before I flushed. It may be working like that for you too, only in reverse. I think when you are finally rid of all stones, your eyesight will be vastly improved. I know I have that hope for myself.