It looks to me like your rabbits eye is infected, as evidenced by the white cloudiness in the eye and the thick white discharge at the corner of the eye. Because it has been like this for a prolonged period, antibiotics aren't likely to be effective alone in clearing up the infection. The eye most likely would need to be removed. There could also be infection behind the eye because of the thick white discharge coming out, in which case that would need treatment as well. The vet will also need to do full head xrays to rule out any dental involvement, as infections and weepiness from the eye can often be dental related.
This link has some info on it and pictures from the beginning stages. Your rabbits infection is very advanced.
Due to the fact that originally your rabbit likely had a corneal ulcer from a scratch to the eye and this became infected(which would account for the white cloudiness to the eye), and the vet you saw misdiagnosed this as a cataract and left your rabbit without the correct treatment(antibiotic eye drops), I personally would not go back to that vet and would be looking for a much better rabbit savvy vet to take your rabbit to now. The injury and infection to the eye could likely have been easily treated at the time with abx eye drops, and now you are looking at a costly eye surgery, which is a risk for an older rabbit to have to go through. You can take a look at this list to see if there is a recommended rabbit savvy vet near you. If you are in the UK, there is a different list for rabbit savvy vets that I can give to you if you need it. I really hope you can find a good competent rabbit vet that will give your rabbit the correct treatment, and that your bun will be alright.