If blindness, which is very rare, occurs, talking books can be a very useful means of entertainment and information. Again, corticosteriods are used for the acute episode. Patching one eye helps double vision and some types of blurred vision. Prisms in the glasses are used for the chronic phase. Occasionally the drug Baclofen may alleviate oscillopsia.
Nearsightedness can also worsen with age.
The only known precipitating factors for exacerbations of MS are upper respiratory infections and delivery of a baby.