oh gosh, so sorry, that is really bad, very very bad and i don't want to be the one to say this, but.... at the stage as he is right now the chances of survival are minimal even if you do all you can, force feeding will help to sustain him for a little. melafix won't help here too. you need to run ( i mean it - RUN asap) to vet who is treating frogs and get meds - NaCL eye solution to reduce swelling and special eye antibiotics drops + systemic antibiotics, but honesty i don't think they will help (((( too advanced stage and too bad shape of the frog itself.

I'm so so sorry.