Should i notice vision problems on my own, given a diagnosis of vertical nystagmus?

Not necessarily: Depending upon the intensity of the nystagmus as well as exactly how it gets activated a person may actually not notice too much going on in the peripheral or central visual fields. For instance if eyes are straight ahead and it's bearly perceptible you may not notice anything....However, at the moment your eyes look to one side, you may notice the fields of vision "jumping." why do you have it?