Original articleIntraocular pressure, Goldmann applanation tension, corneal thickness, and corneal curvature in Caucasians, Asians, Hispanics, and African Americans☆
Section snippets
Design
This was a retrospective cross-sectional observational study.
Methods
Charts of 2,479 eyes of consecutive patients undergoing presurgical examinations for refractive surgery without ocular pathology between July 1999 and June 2002 at a multisurgeon refractive surgery center (Laser One, Inc.) in New York City were reviewed retrospectively. Pertinent information was transcribed into the computer database.
A total of 1,976 eyes were studied, of which 1,482 Caucasian (74.86%), 172 Asian (8.68%), 118 African-American (5.96%), and 204 Hispanic eyes (10.45%) had central
Results
The mean age of the population was 37.36 ± 9.71 years. The breakdown of age by ethnic groups is shown in Table 1.
Age and GAT do not appear to be related in this sample population (Figure 1). Regression between age (X) and GAT (Y) yielded: Y = 14.307 + 0.016* X; R^2 = 0.004. Correlations coefficient: 0.06; P = 0.063. This may be a reflection of the relative youth of the population studied.
Mean GAT by total population and the four ethnic groups (Table 2) were not significantly different. Mean
Discussion
A large-scale population study of central corneal thickness, corneal curvature, and GAT in different ethnic groups is difficult. As a substitute for such a study, we chose to review charts of patients who underwent presurgical examinations at a refractive surgery center. That is not an ideal unbiased population in terms of comparing racial variations, but our primary intention was to collect a sufficiently large database for statistical comparison of other parameters. It was our concern that
Acknowledgements
We acknowledge statistical consultation by Ms Melissa L. Earl, MPH, Director, Innovative Medical and Epidemiology Data Solutions, Moreno Valley, California.
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InternetAdvance publication at ajo.com April 22, 2003.