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Evidence that a gender difference in intraocular pressure is present from childhood
Insights
Intraocular pressure (IOP) shows a slight female advantage from childhood, remaining consistent into adulthood. This study found minimal changes in IOP levels across age groups, suggesting a stable physiological parameter.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Ocular Physiology
Background:
- Intraocular pressure (IOP) assessment typically focuses on adults over 40 at risk for glaucoma.
- Previous studies indicate gender differences in adult IOP, with females generally having higher values.
- Diurnal variations in IOP have been observed in adults during typical clinic hours.
Purpose of the Study:
- To investigate intraocular pressure (IOP) levels in children and compare them with adult data.
- To examine gender-based differences in IOP from childhood through adulthood.
- To determine if IOP levels change significantly from childhood into adulthood.
Main Methods:
- Collected IOP data from 140 school children (aged 9-11 years) in the early afternoon.
- Utilized previously published IOP data from 100 middle-aged adults (40-59 years) and 102 mature adults (>60 years).
- All data were recorded between 14:00 and 14:59 hours for consistent diurnal comparison.
Main Results:
- A non-statistically significant trend of higher mean IOP in females compared to males was observed across all age groups, starting in childhood.
- Mean IOP levels showed minimal alteration from childhood into and throughout adulthood for both genders.
- The physiological mechanisms underlying these consistent IOP findings remain unclear.
Conclusions:
- Intraocular pressure (IOP) exhibits a subtle, persistent gender difference (female > male) detectable from childhood.
- Mean IOP levels appear remarkably stable from childhood through adulthood, irrespective of gender.
- Further research is needed to elucidate the physiological basis for the observed stability and gender differences in IOP.
Abstract:
Routine assessment of intraocular pressure (IOP) is usually confined to the clinical population aged over 40 years, i.e., to those individuals considered to be most at-risk of developing glaucoma. Published IOP data collected from assumed non-glaucomatous adult subjects have shown a gender difference in this parameter, with human females recording a consistently higher value than age-matched males. A recent study has also demonstrated that a diurnal variation in IOP can be recorded in adults across normal consulting hours. IOP material is presented here, as collected in the early afternoon (14.00-14.59 hours) from n = 140 school children aged > or = 9 < 12 years. It is complemented by previously published data, also recorded between 14.00-14.59, from n = 100 middle-aged adults aged 40-59 years, and n = 102 mature adults aged over 60 years. Analysis of these three data sets indicates that a non-statistically significant gender difference in mean IOP (female > male) is present from childhood; it also suggests that, for either gender, the absolute mean level of IOP remains little altered from childhood into and throughout adulthood. However the physiological basis for these observations remains obscure.
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