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Related Experiment Videos

Accommodative fluctuations in Adie's syndrome.

K Ukai1, S Ishikawa

  • 1Department of Ophthalmology, School of Medicine, Kitasato University, Kanagawa, Japan.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|January 1, 1989
PubMed
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Higher frequency accommodative fluctuations may originate from neural pathways, not the accommodative plant. This study in Adie's syndrome suggests a neural origin for fast accommodation oscillations.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Physiology

Background:

  • Accommodative fluctuations, particularly higher frequency components (around 2 Hz), have been hypothesized to originate from the accommodative plant.
  • The precise origin of these fast fluctuations and their role in accommodation control remain debated.

Observation:

  • Dynamic responses of accommodation were recorded in two patients diagnosed with Adie's syndrome.
  • Key observations included a reduction in the velocity of accommodative responses.

Findings:

  • Accommodative fluctuations in the higher frequency components were completely absent in the observed Adie's syndrome cases.
  • The velocity of accommodative responses was significantly reduced.

Implications:

Related Experiment Videos

  • The findings suggest that the origin of fast accommodative fluctuations is not peripheral to the tonic accommodation lesion.
  • Given the potential lesion site at the ciliary ganglion in Adie's syndrome, the study posits a neural origin for fast accommodation oscillations, rather than the accommodative plant.