Abstract
Purpose :
Previously, it has been shown that ocular anatomy may be different in different ethnicities. However, little is known about differences in corneal tomography between Hispanic and non-Hispanic populations. This study aims to compare corneal tomographic parameters as measured by Pentacam between Hispanic and non-Hispanic White populations.
Methods :
In this retrospective study, we analyzed Pentacam data from patients who underwent surgery for senile cataract. We included patients 50 years or older who were self-identified as Hispanic White and non-Hispanic White. We excluded patients with corneal or anterior segment surgery or trauma, or any abnormality in these structures. The following parameters were compared between the Hispanic White and non-Hispanic White groups for both anterior and posterior corneal surface: steep keratometry (K1), flat keratometry (K2), mean keratometry (Km), maximum keratometry (Kmax), amount of astigmatism, axis of steep meridian, and type of astigmatism.
Results :
This study consisted of 200 patients, including 103 Hispanic White individuals and 97 non-Hispanic White individuals. The mean age was 69.9 ± 7.4 years (range, 50-88 years), and there were 68 men and 132 women. There were no statistically significant differences between Hispanics and non-Hispanics regarding K1, K2, Km, Kmax, amount of astigmatism, and steep axis in both front and back corneal surfaces. There were also no significant differences in type of corneal astigmatism (with-the-rule, against-the-rule, or oblique) in front or back corneal surfaces between these two groups. There were significant differences between right and left eyes in corneal front steep axis (73.8 ± 49.9 deg vs 104.3 ± 49.7 deg, respectively, P<0.001) and corneal back steep axis (97.8 ± 22.8 deg vs 82.8 ± 21.7 deg, respectively, P<0.001). However, no differences existed in corneal front and back steep axes between Hispanics and non-Hispanics.
Conclusions :
There are no significant differences in corneal tomographic parameters, including keratometry and degree and amount of astigmatim in front and back corneal surfaces between Hispanic and non-Hispanic White patients.
This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.