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Does body position, age, and heart rate induce IOP's changes?

Marcelina Sobczak1, Magdalena Asejczyk1, Malwina Geniusz1

  • 1Department of Optics and Photonics, Wroclaw University of Science and Technology, Wrocław, Poland.

European Journal of Ophthalmology
|June 7, 2021
PubMed
Summary
This summary is machine-generated.

Intraocular pressure (IOP) measurements differ significantly between sitting and supine positions, with age influencing these changes. While body position may not critically impact IOP readings in healthy individuals, heart rate shows a notable effect.

Keywords:
Examination techniquescornea/external diseasediagnostic techniquesglaucomahealth economics

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Area of Science:

  • Ophthalmology
  • Physiology
  • Gerontology

Background:

  • Intraocular pressure (IOP) is a critical metric in ophthalmic health.
  • Understanding factors influencing IOP, such as body position and age, is essential for accurate clinical assessment.
  • Cardiovascular parameters may also play a role in IOP regulation.

Purpose of the Study:

  • To investigate the differences in intraocular pressure (IOP) between supine and sitting positions.
  • To assess the impact of age on IOP variations.
  • To evaluate the correlation between cardiovascular parameters and IOP measurements.

Main Methods:

  • Seventy-two healthy adults were categorized into three age groups (20-30, 31-40, 41-71 years).
  • Corneal biometry and cardiovascular parameters, including heart rate (HR), were recorded.
  • IOP was measured in both sitting (IOPs) and supine (IOPL) positions using the iCare® Pro tonometer.

Main Results:

  • A statistically significant difference in IOP was observed between sitting and supine positions across the entire cohort (p < 0.001).
  • Significant IOP differences between positions were noted in the youngest (20-30 years) and oldest (41-71 years) age groups.
  • Heart rate demonstrated a significant influence on IOP differences between body positions, particularly in older age groups.

Conclusions:

  • Age significantly affects IOP values and the difference between supine and sitting measurements.
  • While cardiovascular parameters show some statistical dependencies, their significance is marginal in younger individuals.
  • Despite statistically significant dependencies, body position may not critically alter IOP measurements in healthy subjects.