Hi and welcome,
Unfortunately, waiting for answers can be a test on your patients but you generally require specialist training to interpret VEP results, your going to be a lot better off waiting for your husbands neurologist to interpret his VEP test results than tying to make sense of it with any hope of accuracy...
What i can tell you is that whist the VEP can be helpful if the result are suggestive/consistent with MS and could provide the additional evidence of a prior attack that your husband may not currently have.......he needs evidence of at least 2 attacks to be diagnosed, but even if his VEP results were normal, the VEP wouldn't exclude MS if your husband does have some other MS suggestive/consistent abnormal neurological evidence.
"Despite the fact that VEPs are used to help make a diagnosis of MS, other conditions can also produce abnormal results, so this test is not specific for MS. The information the tests provide needs to be considered along with other laboratory and clinical information before a diagnosis of MS can be made."
http://www.nationalmssociety.org/Symptoms-Diagnosis/Diagnosing-Tools/Evoked-Potentials
Sorry i couldn't be more helpful.....JJ