Hi and welcome,
There is the potential of being diagnosed with MS within 5 years after being diagnosed with optic neuritis, when the patient also has brain lesions on their MRI.....BUT MS is never that simple or really ever predictable.
From what i understand in your previous post, your visual issue is 'bilateral' which isn't typical of the visual issues caused by neurological conditions like MS so it's potentially more typical to one of the alternative conditions, too get an idea of them see link below.
https://www.reviewofoptometry.com/ce/the-differential-diagnosis-of-an
Hope that helps........JJ