Andarine S4 is great if you want raw strength without the fance muscle mass, and it really works. In my opinion, the vision side effects are greatly overhyped, because they are not that serious, and they can be easily prevented and dealt with. First of all, even it this happens, the vision side effect goes away in a matter of days after stopping the use of Andarine S4. Secondly, if you start the first two weeks of the cycle with just half the dosage, and then continue with the full dosage, there will be considerably less chances of that happening. Finally, using moderate and reasonable dosages is a very good way of avoiding vision related side effects. Personally, I would never use more than 50 mgs per day - this dosage is plenty for good results, and the sides are minimal. Anything over that will give minimal improvements, but will increase the chances of getting side effects.