Because of the waveform, there has been much enthusiasm for measuring the so-called 'foveation period'.
When there is no stress attached to a task (for example no time constraint on performance), increasing visual demand does not increase nystagmus, (7) but may actually increase foveation periods. (8) The effect of stress per se (for example electric shock, reward manipulation) is to increase the nystagmus intensity (reduce foveation periods), but has surprisingly little effect on VA.
(28) developed an objective performance measure based on an individual's foveation periods called a nystagmus acuity function (NAF).
Insertion of acupuncture needles into the sternocleidomastoid muscles of the neck may reduce nystagmus intensity in some individuals; (61) this can also improve the duration of foveation periods
, with the effects sometimes being sustained after treatment.