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  Indian J Med Microbiol
 

Figure 4: Eye movement recording from patient with albinism and typical periodic alternating nystagmus performed under binocular conditions using velocity data trace from the preferred right eye over 200 s illustrating a typical periodic, symmetric, oscillation with approximately 90 s of jerk right followed by 10-20 s of slowing and direction change followed by 90 s of jerk left. Up is right (R), down is left (L), upper trace is position and lower trace is velocity in both upper and lower portions of the figure

Figure 4: Eye movement recording from patient with albinism and typical periodic alternating nystagmus performed under binocular conditions using velocity data trace from the preferred right eye over 200 s illustrating a typical periodic, symmetric, oscillation with approximately 90 s of jerk right followed by 10-20 s of slowing and direction change followed by 90 s of jerk left. Up is right (R), down is left (L), upper trace is position and lower trace is velocity in both upper and lower portions of the figure