Of electronic eye movement recording and mathematical “biomodeling,” specifically, top-down, behavioral models capable This chapter is a coalescence of the traditional neuro-ophthalmologicĪpproach to nystagmus diagnosis and the impact of the newer capabilities 2 Nystagmus diagrams can be detailed and complex if one uses these symbols. Third-degree leftward jerk nystagmus.įig. Second-degree jerk nystagmus beating leftward in primary positionĪnd increasing on left gaze. First-degree jerk nystagmus present only on left lateral gaze. Pendular nystagmus in primary position and up or down, converting to jerk Heavy lines indicate more intense nystagmus. SingleĪrrowhead indicates jerk nystagmus and points in direction That velocity of nystagmus phases are equal (i.e., pendular). 1 Simple diagrammatic method for depicting nystagmus.
Of different types of nystagmus, only ocular motility recordingsĬan guarantee diagnosis that is both accurate and repeatable.įig. To the complexity of nystagmus waveforms and the possibility of combinations Slit-lamp magnification or when the fundus is viewed. Also, nystagmusĬan be further described when the globes are inspected under Figures 1 and 2 are examples of one convenient method of diagramming nystagmus. Many useful, oftenĭiagnostic, observations can be made by physical examination alone. Nystagmus analysis, the clinician should not be daunted. Inįact, the distinguished neuro-ophthalmologist Wilbrand onceĪdvised “never write on nystagmus, it will lead you nowhere.” 1Īlthough technologic advances have permitted quantitative insights into
Oscillation of the eyes, has been regarded as enigmatic. Nystagmus (derived from the Greek word, νμσταγμοσ, meaning drowsiness, is derived from νμσταζειν, meaning “to nod in one's sleep”), the rhythmic to-and-fro In theįirst it is ridiculed, in the second it is opposed, in the third it is Nystagmus and Saccadic Intrusions and OscillationsĮvery truth passes through three stages before it is recognized. Nystagmus and Saccadic Intrusions and Oscillations Chapter 11
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