Financial disclosure: The authors have no proprietary or financial interest in this study. Partial equipment grants for the study were received from Ophthalmic Research Institute of Australia B & L Lowe Grant and NH & MRC: Centre for Clinical Research Excellence.
Distribution and associations of intraocular pressure in indigenous Australians within central Australia: the Central Australian Ocular Health Study
Article first published online: 24 MAR 2011
© 2011 The Authors. Clinical and Experimental Ophthalmology © 2011 Royal Australian and New Zealand College of Ophthalmologists
Clinical & Experimental Ophthalmology
Volume 39, Issue 7, pages 607–613, September/October 2011
How to Cite
Landers, J., Henderson, T. and Craig, J. (2011), Distribution and associations of intraocular pressure in indigenous Australians within central Australia: the Central Australian Ocular Health Study. Clinical & Experimental Ophthalmology, 39: 607–613. doi: 10.1111/j.1442-9071.2011.02507.x
- Issue published online: 3 OCT 2011
- Article first published online: 24 MAR 2011
- Accepted manuscript online: 21 JAN 2011 11:22AM EST
- Received 4 October 2010; accepted 7 January 2011.
- Indigenous Australians;
- Intraocular pressure
Purpose: To determine the distribution and associations of intraocular pressure (IOP) among the indigenous Australian population living in central Australia.
Design: Clinic-based cross-sectional study.
Participants: 1884 individuals living in one of 30 remote communities within the statistical local area of ‘Central Australia’. This equated to 36% of those aged ≥20 years and 67% of those aged ≥40 years within this district.
Methods: Participants aged 20 years or over were recruited as they presented to the eye clinic at each remote community. Of those recruited into the study, 1060 underwent IOP measurement using either a Perkins tonometer (Haag-Streit, Koeniz, Switzerland) or an ICare tonometer (Tiolat Oy, Helsinki, Finland) depending on the availability of equipment. Central corneal thickness (CCT) was also measured using ultrasound pachymetry.
Main Outcome Measures: The distribution and associations of IOP from the right eye of each participant is presented.
Results: Mean IOP was 12.8 mmHg (SD 3.2 mmHg) and CCT was 512 µm (SD 36 µm). IOP was strongly associated with CCT (r2 = 0.14, t = 3.87; P < 0.0001), showing an increase of 0.4 mmHg with every 10 µm increase in CCT. Furthermore, IOP was strongly associated with age, decreasing by 1.9 mmHg for every decade increase in age, but only for eyes with a CCT above the mean.
Conclusion: IOP of indigenous Australians is lower than any other racial group previously published. This may relate to the low CCT readings found among this population. Clinicians will need to bear this in mind when examining indigenous Australians and make appropriate allowances for the measured IOP.