What are common causes for mild oscillopsia with upbeat nystagmus in one eye , unremarkable mri , ophthalmologist exam eyes health , can oscillopsia be caused by whiplash injuries cervical or even just made worse by stress ?

Yes, neurological and ophthalmological conditions can symptomatically temporarily worsen under periods of increased emotional stress. Unilateral oscillopsia and upbeat nystagmus may be due to problems with the superior oblique eye muscle. If inner ear or brain would be bilateral. The former may fluctuate and be hard to see clinically. A videonystagmogram may be needed.