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Related Experiment Videos

Ocular pulse amplitude in myopia.

Y F Shih1, I H Horng, C H Yang

  • 1Department of Ophthalmology, National Taiwan University Hospital, Taipei, Republic of China.

Journal of Ocular Pharmacology
|January 1, 1991
PubMed
Summary
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Higher myopia is linked to lower ocular pulse amplitude in patients. This finding suggests potential circulatory issues in myopia development, impacting choroidal blood flow.

Area of Science:

  • Ophthalmology
  • Optometry
  • Ocular Physiology

Background:

  • Myopia, a common refractive error, affects a significant portion of the global population.
  • The ocular pulse amplitude (OPA) is a measure of pulsatile blood flow within the eye.
  • Understanding factors influencing OPA is crucial for comprehending ocular hemodynamics.

Purpose of the Study:

  • To investigate the relationship between ocular pulse amplitude and myopia.
  • To determine correlations between OPA and various ocular parameters in myopic individuals.

Main Methods:

  • Alcon Pneumotonography was utilized to measure ocular pulse amplitude.
  • A cohort of 188 myopic patients (376 eyes) was included in the study.

Main Results:

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  • A significant inverse correlation was observed between the degree of myopia and ocular pulse amplitude.
  • OPA showed a strong correlation with refractive error and axial length.
  • Poor correlation was found between OPA and scleral rigidity, intraocular pressure, and corneal curvature.

Conclusions:

  • Reduced ocular pulse amplitude in higher myopia may indicate impaired choroidal blood flow.
  • Circulatory disturbances could play a role in the pathogenesis of myopia.
  • Further research into ocular hemodynamics is warranted for myopia management.