For ms people why they having eye problem some days the vision gets better and sometimes gets worse? what cause the problem?

Optic Neuritis: Inflammatory optic neuritis is a well-described component of multiple sclerosis, and is often the first presenting sign. Oral steroid use is contraindicated, since it makes recurrences more common. While the visual acuity may improve, contrast sensitivity and color vision may be permanently diminished. See a neuro-ophthalmologist..

MS and eye disease: Optic neuritis is inflammation of the optic nerves that presents with vision loss, pain with eye movement & "fading vision" when a person gets hot (like in the shower). It is most commonly associated with ms- multiple sclerosis - especially in women. Ms patients with fluctuating vision need to see their eye md.

COMPLEX ISSUES: Ms affects optic nerves directly but lesions can be present anywhere along the visual pathways, even in the brainstem, causing double vision, ocular imbalance, and incoordination. Prior areas of involvement can transiently worsen with hot surroundings, exercise, fatigue, infections, medication reactions, and true relapses. If you fluctuate frequently, you may be acquiring progressive ms, see doc.