DT Visual Fields

The Benefits You Expect from Frequency Doubling Technology

Since its introduction, over 8,000 doctors have chosen Frequency Doubling Technology to quickly and accurately detect the early stages of visual field loss associated with glaucoma, and other eye diseases.

Welch Allyn patented Frequency Doubling Technology

• Easy on your patients
• Rapid screening and full threshold results
• Frequency-doubling stimuli reduce patient anxiety during testing
• No eye patch is necessary

​​​​​​​Glaucoma Detection FDT

Now with expanded glaucoma management tools.

Building upon Frequency Doubling Technology, Humphrey® Matrix represents the latest advancement in clinically-validated glaucoma management.