The vision in my right eye went funny yesterday and today it’s aching and painful. I don’t understand 
Sorry to hear this, Rebecca. I’m afraid that this is one for an emergency GP visit/phone appt and (most likely) a referral from there to your local Opthalmological emergency out-patient clinic. Maybe it’s MS-related, maybe it isn’t - you need the experts to decide. Never ignore sudden eye symptoms - they can be serious and require urgent attention.
Alison
Hi Rebecca
do you have an ms nurse you can call? I’ve had this before and it’s been caused by optic neuritis. Thats not to say this is causing your pain, but is a possible cause.
Hope you get it sorted soon
Freckles x