CORRELATION BETWEEN THE VISUAL-FIELD INDEXES AND HEIDELBERG RETINA TOMOGRAPH PARAMETERS

Purpose: We wished to determine whether a relationship exists between Heidelberg retina tomograph (HRT) parameters and the visual field indi ces. Methods: One eye was randomly chosen from 59 normal patients [nor mal visual held and normal optic nerve head (ONH) and intraocular pres sure (IOP) <21 mm Hg], 64 ocular hypertensive patients (normal visual field and normal OHN and IOP >22 mm Hg), 124 high-tension glaucoma pat ients (abnormal visual field and/or abnormal optic nerve and IOP >22 m m Hg) and 47 low-tension glaucoma patients (abnormal visual field and or optic disc and IOP <21 mm Hg). All the patients were examined with Humphrey Perimeter, program 30-2, and HRT. Findings were assessed by a nalysis of variance, Pearson's correlation coefficient, and multiple l inear regression. Results: Among all subjects, we noted a statisticall y significant correlation (Pearson's r, p < 0.001) between cup area, c up/disc area ratio, rim area, rim volume, cup shape measure, and retin al nerve fiber layer cross-section area with mean deviation and correc ted pattern SD. Multiple linear regression analysis demonstrated that rim area was the most important predictor of mean deviation and correc ted pattern SD. Conclusions: The presence of significant correlations between some HRT parameters, such as rim area and cup shape measure an d visual field indices, suggests that these HRT parameters could be go od indicators of the degree of glaucomatous ONH damage.