I'm really glad that you noticed this, and am extremely sorry that I missed an important aspect of my modification of this sentence.
In the sentence to which you are referring, I took out "she" to enhance the flow and meant to also take out the comma before "but", as taking out the "she" transforms the previously independent clause into a dependent clause (and thus no comma is needed). Therefore, what I meant to say was:

"She reported that she occasionally wears glasses but is not able to wear them for long periods of time because they hurt her eyes." 

Please accept my apologies for having neglected to remove the comma in my original correction. I hold myself to a higher standard of service than to leave errors in your paper, and I'm sorry to have caused you extra effort and concern about your paper.