Originally Posted by deb1125
Can nystagmus consist of 2 seconds of your eyes going haywire back and forth but not affecting sight?
2 seconds probably not. Some nystagmus is physiologically normal. For example if you turn your eyes to the extreme position you will evoke nystagmus for a short period of time. This is normal. It will not effect your sight.
Primary position nystagmus tends to be constant and does effect sight to some degree, usually causing blurry vision, although one might not notice it.
In the case of some brainstem lesions, a person may have nystagmus when the eye is turned to the extreme position, but it is course and it does not stop. It generally does not effect vision unless the lesion is active (for example in an exacerbation) when it can cause double or blurry vision.
Have I confused you yet?
I have both primary and extreme nystagmus.
Both effect my vision at times.