MORPHOMETRIC PARAMETERS IN HIGH-TENSION AND NORMAL-TENSION GLAUCOMA Correlation with visual field indices

The aim of the study was to determine the optic disc morphometric parameters in high-tension and normaltension glaucoma by confocal scanning laser ophthalmoscopy and correlate the results with the visual field indices. One hundred and seventy-one glaucomatous patients were recruited for the study. For each patient, one eye was randomly chosen. Normaland high-tension glaucomatous patients were classified using intraocular pressure (IOP): the normal-tension glaucoma group had an IOP of <22 mmHg during a diurnal tension curve, while high-tension glaucoma patients had an IOP of >21 mmHg in at least three measurements. All the patients were examined with the Humphrey Field Analyzer, Program 30-2, and the Heidelberg Retina Tomograph (HRT). The relationship of the HRT morphometric parameters to the visual field indices were explored by Pearson’s interclass correlation coefficient and a linear regression model. One hundred and twenty-four high-tension glaucoma eyes and 47 normal-pressure glaucoma eyes were assessed. No significant differences were found between highand normal-tension glaucoma eyes for any morphometric parameters. Although different correlations were found between the HRT parameters and the visual field indices in the normal-tension and high-tension glaucoma, linear regression analysis showed that in both groups rim area was the most important predictor of mean deviation and corrected pattern standard deviation.