early on i posted about how my oscars eyes had gone. After the advice from paul (thanks) the oscars eyes are sort of back. they are there but it's like there is a thick white layer over them, which i can see the oscars eyes but i still don't think that it can anyhting becuse it's behaviour is the same as it was when it had no eyes. Any advice from this?

Have the eyes gone very cloudy? Can you please test your water for ammonia, nitrites, nitrates and pH?

From this and the other post you posted, your fish has popeye! The most common cause are fighting (usually only in one eye) or poor water (usually both eyes). Popeye is caused by bacteria getting into the eye. I am guessing your cause is poop water so as OFL says post water test results. In the meantime do daily 25% water changes, and add myxazin. You can feed him but if he doesnt feed remove the food. You may find he cant see so wont eat but dont worry about that oscars can go 2 weeks without food easy

What does myxazin do? Thanks!

Its an anti bacterial, bacterial causes pop eye