[WhoPoopWrasse]

Praziquantel in a QT.
Look at the surface of the eye, with eye flukes there is a raised flat semi transparent animal actually sitting on the eye ball. with a bacterial infection the eye tends to be cloudy all over, swollen and may be reddened around the edges of the socket.
If it is eye flukes, sometimes it goes away by itself but that sort of risky since the fish could lose it's eye...