Frequency doubling technology (FDT) perimetry is based on a flicker illusion created by counterphase flickering of a low spatial frequency sinusoidal grating at a high temporal frequency. [1]

FDT offers many advantages in that it is easy to administer and interpret, liked by most patients, not greatly affected by refractive error and cataract, has high test-retest reliability, offers rapid screening tests, and has different full threshold programs.

FDT and Humphrey Matrix perimetry have been shown to be effective in the detection, evaluation, and follow-up of glaucomatous visual field loss.

May 1, 2009 · But the Humphrey Matrix Perimeter with Welch Allyn frequency-doubling technology from Carl Zeiss Meditec has made far greater inroads into clinical practice. The Matrix offers three main testing algorithms for generating visual fields.

We aimed to investigate the efficacy of frequency doubling technology (FDT) perimetry for glaucoma detection in comprehensive screening examinations. We performed a retrospective analysis of prospectively collected data of participants who underwent a comprehensive health checkup service.

Aug 21, 2024 · What is FDT Matrix Campimetry? This is a campimetry that uses FDT dual-frequency technology to detect glaucomatous losses (visual field alterations) with great sensitivity. Due to the exam’s quickness, this technology is very useful for the study of the visual field in cases of difficulty of collaboration due to advanced age or other reasons.

FDT and Humphrey Matrix perimetry have generally been found to be useful for screening, evaluation, and the follow-up of visual field loss in glaucoma and other ocular and neurologic diseases.

PURPOSE: Frequency Doubling Technology (FDT) perimetry is a novel perimetric test that provides rapid screening (45 to 60 seconds) and full-threshold (4 to 5 minutes) testing for detection of vision loss.

FDT perimetry (English acronym for Frequency Doubling Technology) is a technology that examines the sensitivity of a particular population of retinal neuronal cells, called type "My" (representing 3.5% of the total retinal nerve cell).

Frequency doubling technology (FDT) perimetry measures contrast sensitivity. This test is based on an illusion occurring when a sinusoidal grating of low spatial frequency undergoes counterphase flickering at a high temporal frequency [1 - 3].