Influences of Atmospheric Pressure and Temperature on Intraocular Pressure
| Autor: | Charlotte Renier, Ingeborg Stalmans, Peter Germonpre, Sara Van de Veire, Thierry Zeyen |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Male medicine.medical_specialty Intraocular pressure Adolescent genetic structures Blood pressure change Blood Pressure Tonometry Ocular Ophthalmology Healthy volunteers medicine Humans Prospective Studies Intraocular Pressure Hyperbaric Oxygenation Atmospheric pressure Chemistry Temperature eye diseases Surgery Left eye Atmospheric Pressure Blood pressure Perkins applanation tonometer Female sense organs Bar (unit) |
| Zdroj: | Investigative Opthalmology & Visual Science. 49:5392 |
| ISSN: | 1552-5783 |
| DOI: | 10.1167/iovs.07-1578 |
| Popis: | Purpose To determine whether the atmospheric pressure (ATM) change experienced during diving can induce changes in the intraocular pressure (IOP) of eyes in a normal population. Methods The IOP of 27 healthy volunteers (ages, 23.8 +/- 4.9 years; range, 18-44) was measured with a Perkins applanation tonometer by two independent investigators who were masked to the previous measurements. Measurements were taken at baseline (normal ATM, 1 Bar and 24 degrees C), at 28 degrees C and 24 degrees C after the ATM was increased to 2 Bar in a hyperbaric chamber, at baseline again, and finally at the normal ATM of 1 Bar but a temperature of 28 degrees C. Multivariate regression analysis was used to evaluate the Results results. The mean IOP decreased significantly from 11.8 mm Hg in the right eye (RE) and 11.7 mm Hg in the left eye (LE) at 1 Bar to 10.7 mm Hg (RE) and 10.3 mm Hg (LE) at 2 Bar (P = 0.024, RE; P = 0.0006, LE). The IOP decrease remained constant during the ATM increase period (40 minutes) and was independent of the temperature change. The temperature increase alone did not significantly influence the IOP. Conclusions An increase of the ATM to 2 Bar (equal to conditions experienced during underwater diving at 10 meters) modestly but significantly decreased the IOP independently of the temperature change. During the period of increased ATM (60 minutes), the IOP decrease remained stable and was independent of blood pressure change or corneal thickness. |
| Databáze: | OpenAIRE |
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