Hi. Sorry I hadn't noticed this post before.
Really pleased to hear that she has got so much better. You seem to have done very wel for her. :) The only thing I would like to add is concerning your water changes. Doing 100% water changes are not a good idea because this kills a lot of the beneficial bacteria in the tank therefore starting a mini cycle. I understand your thinking - a full change to remove all the medicatin at the end of the treatment but this really isn't necessary. It's much better to do some smaller changes. 25% every day for the next few days, by which time it will be very diluted that the medication will be negligeable.
Did you cycle the tank? And do you know your water parameters? During medication the parameters can often go a bit off so I wouldn't worry too much The water change you're about to do will help. Cloudy eyes are often a sign on bad water quality so if you didn't cycle the tank, or indeed if the previous owners didn't take care of the water quality then this could well be the case.
If you want mroe informatin on cycling then there is a great sticky in the starting and maintaining section of the forum by fish4all which will give you all the information you need.
Hope this helps, and it's nice to see that your betta has somebody who cares about her now. :)