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Related Experiment Videos

Substrates of negative accommodation.

Amir Raz1, Gerald P Marinoff, Kim S Landzberg

  • 1Department of Psychiatry, Columbia University College of Physicians & Surgeons, New York State Psychiatric Institute, New York, NY 10032, USA. ar2241@columbia.edu

Binocular Vision & Strabismus Quarterly
|June 8, 2004
PubMed
Summary

Negative accommodation, a rare visual event with clear vision flashes, involves a decrease in eye power. Its exact mechanism remains unestablished, but a potential explanation is proposed.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Negative accommodation is a poorly documented phenomenon where clear vision flashes occur with decreased eye plus power.
  • Few dated studies exist, with recent claims of objective assessment by clinicians.

Purpose of the Study:

  • To explore the potential mechanism behind negative accommodation.
  • To explain informal reports of improved visual acuity in uncorrected myopes.

Main Methods:

  • Review of existing literature.
  • Theoretical modeling of a potential mechanism.

Main Results:

  • A potential mechanism for negative accommodation is proposed.
  • The phenomenon's mode of operation is not yet definitively established.

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Conclusions:

  • Negative accommodation, if it exists, may operate via the proposed mechanism.
  • Further research is needed to confirm its existence and mechanism.