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Abstract #11525 Published in IGR 6-3
Comparison of the optic nerve rim tissue between healthy Caucasian and Hispanic populations using the HRT II
Sendrowski DP; Kostura II MR; Kostura SKClinical and Refractive Optometry 2004; 15: 142-148
BACKGROUND: It has been demonstrated that differences in cup-to-disc ratios exist between individuals of different racial groups. These differences are important for eye-care practitioners to consider in ascertaining the potential risks of developing blinding diseases such as glaucoma. The Heidelberg Retinal Tomograph (HRT) II is a scanning laser ophthalmoscope that is able to accurately measure several optic nerve head parameters in a matter of seconds. The instrument programming allows a comparison of the measured optic nerve parameters to a normative sample group. METHODS: Thirty-two Hispanic (58 eyes) and 33 Caucasian (62 eyes) patients were enrolled in this study. The groups were age- and sex-matched, reported no existing health problems, and had just completed a dilated ocular health exam. Screening visual field assessments were normal. The HRT II optic nerve head stereometric parameter data were analyzed using the statistical tests of ANOVA and MANOVA to compare the data. RESULTS: Although most parameters were equal between the two groups, two were shown to be different. The two parameters that had the greatest statistical significance were cup-to-disc ratio, which averaged 0.383 for the Caucasian group and 0.469 for the Hispanic group (P = 0.037). Cup-shape measure was also shown to have the greatest statistical difference between Caucasians and Hispanics at -0.228 and -0.174 respectfully, with a P-value of 0.005. CONCLUSION: This study suggests that Hispanic patients have a steeper shaped cup or a tendency to have a more glaucomatous 'appearing' cup when compared to the Caucasian group. The authors feel that further study of this particular parametric change in cup-shape measure between healthy and glaucomatous Hispanic patients would help further the diagnostic value of our results.
Dr. D.P. Sendrowski, 2575 Yorba Linda Blvd., Fullerton, CA 92831, USA
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)