Purpose: To determine the fiber layer analyzer GDx's specificity in a group of normal subjects, and the most altered parameters for this group. Methods: Normal patients were examined (complete ophthalmologic examination) and then we performed the fiber layer analysis with NFA- GDx (LDT). Total: 34 randomly selected eyes. Results and Conclusion: The specificity was 58.8%, and the corrected specificity 70.5%. The most altered parameter was symmetry (85.71%), and the less altered, the inferior and superior ratio (0%). When we have an isolated altered symmetry in a patient with normal IOP and normal optic disc, the false-positive diagnosis must be remembered; when a suspected glaucoma patient has an altered inferior ratio, glaucoma diagnosis must be remembered.
Nerve fibers; Sensitivity and specificity; Diagnostic techniques ophthalmological; Laser
