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Related Experiment Videos

Choroidal laser Doppler flowmetry in healthy subjects.

M Straubhaar1, S Orgül, K Gugleta

  • 1University Eye Clinic Basel, Switzerland.

Archives of Ophthalmology (Chicago, Ill. : 1960)
|February 17, 2000
PubMed
Summary

Choroidal blood flow velocity declines with age. Choroidal blood flow volume increases with higher intraocular pressure (IOP), indicating a relationship between ocular hemodynamics and these factors.

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Area of Science:

  • Ophthalmology
  • Physiology
  • Medical Imaging

Background:

  • Choroidal blood flow is crucial for ocular health.
  • Understanding factors influencing choroidal hemodynamics is important for diagnosing and managing eye conditions.

Purpose of the Study:

  • To assess normal choroidal blood flow.
  • To investigate the relationship between choroidal blood flow and age, systemic blood pressure, and intraocular pressure (IOP).

Main Methods:

  • Utilized laser Doppler flowmetry (LDF) to measure choroidal blood flow velocity, volume, and flux in 70 healthy subjects.
  • Employed multiple linear regression to analyze the influence of age, blood pressure, IOP, smoking, and sex.
  • Used Pearson correlation to assess interocular differences in IOP and LDF parameters.

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Main Results:

  • Choroidal blood flow velocity significantly decreased with advancing age (P = .03).
  • Choroidal blood flow volume significantly increased with higher IOP (P = .02).
  • Systemic blood pressure, smoking, and sex did not significantly influence LDF parameters. Interocular IOP difference correlated with interocular volume difference (R = 0.34, P<.005).

Conclusions:

  • Choroidal blood flow velocity is inversely related to age.
  • Choroidal blood flow volume is positively associated with IOP, suggesting a link between ocular pressure and erythrocyte movement in the choroid.