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Documenta Ophthalmologica

, Volume 39, Issue 1, pp 155–182 | Cite as

Congenital nystagmus waveforms and foveation strategy

  • L. F. Dell'osso
  • R. B. Daroff
Article

Abstract

Accurate eye movement recordings of sixty-five subjects with congenital nystagmus (CN) provides a firm foundation for the classification of the many types of wave-forms observed and results in objective definitions based on measurable quantities rather than subjective clinical impressions. The careful scrutiny of these records along with the utilization of laser-target retinal cinematography have yielded insights into the mechanism of this ocular motor instability.

Prolongation of target foveation emerges as the dominant factor in many of the resultant waveforms. This enhances the visual acuity of the subject with CN. An additional observation, related to fixation bias reversals of the CN subject, may be a physiological indicator of foveal function.

Key words

Congenital nystagmus nystagmus waveforms nystagmus classification and definitions eye-movement recordings and foveation strategy 

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References

  1. Dell'Osso, L.F., G. Gauthier, G. Liberman & L. Stark. Eye movement recordings as a diagnostic tool in a case of congenital nystagmus.Am. J. Optom. 49:3 (1972).Google Scholar
  2. Dell'Osso, L.F. Fixation characteristics in hereditary congenital nystagmus.Am. J. Optom. 50:85 (1973).Google Scholar
  3. Dell'Osso, L.F., J.T. Flynn & R.B. Daroff. Hereditary congenital nystagmus: An intrafamilial study,Arch. Ophth. 92:366 (1974).Google Scholar
  4. Dell'Osso, L.F. & R.B. Daroff. Functional organization of the ocular motor system.Aerospace Med. 45:873 (1974).Google Scholar
  5. Jung, R. & H.H. Kornhuber. Results of electronystagmography in man: The value of optokinetic, vestibular and spontaneous nystagmus for neurologic diagnosis and research. In: The Oculomotor System, edited by M.B. Bender, New York, Harper and Row, 1964, chap. 19, pp. 428–488.Google Scholar
  6. Weber, R.B. & R.B. Daroff. Corrective movements following refixation saccades: Type and control system analysis.Vision Res. 12:467 (1972).Google Scholar

Copyright information

© Dr. W. Junk bv Publishers 1975

Authors and Affiliations

  • L. F. Dell'osso
    • 1
  • R. B. Daroff
    • 1
  1. 1.MiamiUSA

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