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Related Experiment Videos

Age differences in central and peripheral intraocular pressure using a rebound tonometer.

J M González-Méijome1, J Jorge, A Queirós

  • 1Department of Physics (Optometry), School of Science, University of Minho, Braga, Portugal. jgmeijome@fisica.uminho.pt

The British Journal of Ophthalmology
|August 4, 2006
PubMed
Summary

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Age influences intraocular pressure (IOP) measurements. Peripheral IOP readings decrease with age, particularly in the temporal region, while central IOP shows no significant age correlation using rebound tonometry.

Area of Science:

  • Ophthalmology
  • Optometry
  • Biomedical Engineering

Background:

  • Intraocular pressure (IOP) is a key metric in glaucoma diagnosis.
  • Rebound tonometry offers a portable method for IOP measurement.
  • Understanding age-related variations in IOP is crucial for accurate clinical interpretation.

Purpose of the Study:

  • To investigate the impact of patient age on central and peripheral intraocular pressure (IOP) measurements.
  • To analyze the relationship between age and IOP readings obtained via rebound tonometry.
  • To compare IOP measurements at the corneal center versus peripheral locations across different age groups.

Main Methods:

  • Utilized the ICare rebound tonometer to measure IOP in 217 participants (aged 18-85).
  • Recorded IOP at the corneal center, and 2 mm nasal and temporal to the limbus.

Related Experiment Videos

  • Categorized participants into young (≤30), middle-aged (31-60), and old (>60) age groups.

    • Main Results:

    • A strong correlation existed between central and peripheral IOP, with central readings higher.
    • Younger patients exhibited higher central IOP values.
    • Older patients showed significantly lower temporal IOP readings compared to younger groups (p<0.001).
    • Nasal and temporal IOP readings demonstrated a significant decrease with increasing age (p=0.011 and p=0.006, respectively).

    Conclusions:

    • Older individuals present with lower temporal peripheral IOP compared to younger and middle-aged cohorts.
    • A negative correlation between age and IOP was observed in the corneal periphery, but not centrally, using rebound tonometry.