A variable slope plotting device is described for the determination of the slow phase component of nystagmus. The value of the plotter is discussed with regard to accuracy and ease in application.
Cassel JC, Mathog RH. Variable Slope Plotter of Nystagmic Velocity. Arch Otolaryngol. 1972;96(2):185. doi:10.1001/archotol.1972.00770090259022
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