Pain to move left eye, blurry vision lower 1/2 visual field that eye only (is like a greasy film over bottom 1/2 of eye). blood pressure perfect?

Optic neuritis: You need to see an ophthalmologist asap. The biggest concern in a woman your age would be optic neuritis. This would explain your symptoms best. You need a thorough exam by an ophthalmologist first the ophthalmologist may order an MRI or have you see a neurologist depending on the findings.

Need exam: Any pain on eye movement accompanied with vision loss is serious, you need to see an ophthalmologist or neurologist as soon as possible.