Introduction: Frequency doubling technology (FDT) provides a screening program for the detection of glaucomatous optic nerve damage. The examination time using this program is very short, less than one minute per eye. High-pass resolution perime-try (HRP) is known to be sensitive for early glaucoma damage and has been reported to detect change earlier, than convention- Introduction: Frequency doubling technology (FDT) provides a screening program for the detection of glaucomatous optic nerve damage. The examination time using this program is very short, less than one minute per eye. High-pass resolution perime-try (HRP) is known to be sensitive for early glaucoma damage and has been reported to detect change earlier, than convention-