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Related Experiment Videos

Ocular haemodynamics in cataractous eyes. A pilot study.

S D Hopkins1

  • 1Johns Hopkins University School of Medicine, Ocular Pharmacology and Therapeutics Unit, Baltimore, MD.

Acta Ophthalmologica. Supplement
|January 1, 1989
PubMed
Summary

Senile cataract is linked to reduced pulsatile ocular blood flow, suggesting potential ischemia in the eye. This finding was consistent in both cataractous and pseudophakic eyes compared to healthy controls.

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Area of Science:

  • Ophthalmology
  • Ocular Circulation
  • Biomedical Engineering

Background:

  • Senile cataract affects a significant portion of the aging population.
  • Ocular blood flow is crucial for maintaining retinal health and function.
  • Previous research has suggested potential links between cataract and altered ocular hemodynamics.

Purpose of the Study:

  • To investigate pulsatile ocular blood flow (POBF) in patients with senile cataract.
  • To compare POBF in cataractous eyes, pseudophakic eyes, and healthy control eyes.
  • To assess intraocular pressure (IOP) and ocular perfusion pressure (OPP) in relation to cataract.

Main Methods:

  • Pulsatile ocular blood flow, systolic and diastolic intraocular pressures, and ocular perfusion pressures were measured.
  • A cohort of 10 patients with bilateral senile cataract (phakic and pseudophakic eyes) was studied.
  • Results were compared to a control group of 8 subjects without ocular pathology.

Main Results:

  • Mean POBF was significantly reduced in cataractous eyes (394 +/- 52 µL/min) compared to controls (571 +/- 40 µL/min) (P < 0.001).
  • POBF was similar in undisturbed cataractous eyes (400 +/- 54 µL/min) and pseudophakic eyes (388 +/- 51 µL/min).
  • Intraocular pressures and ocular perfusion pressures were within normal limits in the patient group.

Conclusions:

  • Cataractous eyes exhibit decreased pulsatile ocular blood flow.
  • This reduction in blood flow may indicate associated ocular ischemia.
  • The findings highlight the importance of assessing ocular hemodynamics in cataract management.

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