The eye tests here are not very difficult, it is only reading out 15 letters with one eye and 15 numbers with your other. I dont know how bad your sight is, in your bad eye, but it may be worth giving the test a go. As you have nothing to loose, and I think it only cost about 10QR.

If you fail you can always go down th especialist route. Any opnicians can give you a test i think, as I just went to a random one.