Oh also something to add. I tried to trick the Hag by giving her Volo's eye and it didn't work or lead to anything new unfortunately. I freed Volo and got his eye before going to see Ethel. Volo's operation happens to the characters right eye (I watched that disturbing cutscene closely to make certain). So when Ethel asked which eye I wanted to offer I told her that one which at this point had been replaced with Volo's magic eye. I was hoping this would lead to either A. tricking the hag and avoiding the debuff, or B. A scene where the Hag realizes I paid with a fake eye. Neither happened. Scene unfolded normally. Debuff still hit.
I then tried the opposite. I went to the Hag ASAP and gave her my right eye. Then I sprung Volo. When it came time to do his quest I was actually unable to get the operation. After Volo pulls out the needle your character says something about only having one good eye and being unable to lose another. I was hoping since I gave the hag my right eye, that Volo would remove the Hag's eye then I could replace it with the magic eye. No luck. Seems that if you have the Hags eye it doesn't differentiate which eye beyond cosmetics.
