Purpose: To establish correlations between structural and functional parameters in glaucoma suspects.
Method: In 43 patients (83 eyes) of glaucoma patients we have performed standard automated perimetry, scanning laser polarimetry (GDx-VCC) of the retinal nerve fiber layer (RNFL) and optical coherence tomography (Stratus OCT) of the RNFL and optic disc.
Results: Diagnostic concordance (achieved if one eye is deemed normal--respectively abnormal--by both tests) was 60.24% between perimetry and OCT respectively 61.44% between perimetry and GDx. The Areas under the Receiver Operating Characteristic curve were between 0.524-0.574 for OCT parameters and 0.518-0.548 for GDx parameters (considering the visual field examination as "gold standard"). The correlation between RNFL measurements in OCT and GDx took values between r = 0.481 and r = 0.352.
Conclusions: Structural and functional damage are not consistent with each other in early glaucoma, resulting in the fact that both tests should be used in the diagnostic strategy
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