I was in this situation early in 1986. Did all the tests done by the DLR (German Aerospace Research) for German Air traffic control. Passed with two others out of 15 in the final run and then the doctors just laughed at my eyesight.
Drove the VW beetle home 700 km from Hamburg, cried eight hours all the way and went to a great punk music concert that same evening.
I then chose to be an aviation weather forecaster rather than a dispatcher at Lufthansa, who tested me, found me acceptable, but asked me to come only two years later.
Weather is nowhere near the glory of ATC or flying for a living but I like the profession a lot.
Else, I think to be an airline dispatcher can be a very satisfying profession.