Description
This exact unit sold recently — but we specialize in sourcing refurbished ophthalmic equipment. Typical turnaround is 2–4 weeks once we confirm availability with our partners. Request a free quote with no deposit required.
Request Availability → Free quote · No obligation · 90-day warranty when shipped
What’s Included
- Humphrey FDT Model 710 Frequency Doubling Technology perimeter
- Power cable (as photographed)
- 6-month Digital Eye Center warranty
Condition & Warranty
Refurbished. Tested and refurbished before listing — internal display verified, fixation target confirmed, patient response button verified, FDT screening protocols (C-20, N-30) confirmed loadable, optics cleaned and aligned. Covered by a 6-month warranty on parts and workmanship.
Humphrey FDT 710 — Refurbished Frequency Doubling Technology Perimeter
The Humphrey FDT 710 is a Frequency Doubling Technology perimeter — a distinct visual-field testing modality that detects glaucomatous defects via low-spatial-frequency, high-temporal-frequency stimuli that selectively isolate the magnocellular pathway. This refurbished humphrey fdt 710 ships ready as a complete fast-screening perimeter at sub-$4K, ideal for high-throughput glaucoma screening.
Unlike traditional bowl perimeters (Humphrey HFA 710/740i/750i), the FDT 710 uses a compact LCD display with sinusoidal grating stimuli rather than a Goldmann-style bowl. Standard protocols include the C-20 (4-minute screening) and N-30 (5-minute threshold) tests — significantly faster than full HFA SITA threshold programs. Ideal as a primary-care or screening-clinic glaucoma triage tool, with HFA bowl perimetry reserved for confirmation and follow-up.
According to a National Library of Medicine-indexed study (Ophthalmology Glaucoma, 2026), Humphrey-platform perimetry algorithms remain the validated reference standard for glaucomatous visual-field defect detection — with FDT screening providing a faster first-pass complement to bowl perimetry.
Why Practices Choose the FDT 710
Frequency Doubling Technology — magnocellular-pathway-isolating stimuli detect early glaucomatous defects.- Fast screening — C-20 protocol completes in ~4 minutes; ideal for high-volume primary-care screening.
- Compact tabletop footprint — fits anywhere; no bowl-perimeter floor space required.
- N-30 threshold protocol — for cases requiring more detailed central-30° threshold testing.
- Patient-friendly interface — short test duration improves cooperation and reduces fatigue artifacts.
- Glaucoma triage workflow — fast first-pass screen; positive results referred for HFA bowl perimetry confirmation.
- Humphrey brand recognition — same Humphrey/Zeiss platform name patients and referring providers know.
- Sub-$4K refurbished price — significant savings vs HFA 740i/745i/750i full bowl perimeters.
Clinical Applications
- Primary-care glaucoma screening — fast first-pass screen during routine eye exams.
- Screening-clinic high-volume workflow — multi-patient throughput with 4-minute C-20 protocol.
- Optometry pre-glaucoma triage — identify candidates needing referral for full HFA evaluation.
- Diabetes/HTN annual eye exam — visual-field component of standard chronic-disease ocular workup.
- Driver vision certification — DOT/DMV-style perimetry workflows.
- Pediatric and elderly screening — short test duration helps with limited-cooperation patients.
Who This Is For
- Optometry practices wanting a fast glaucoma-screening perimeter at sub-$4K.
- Primary-care and family-medicine offices adding visual-field screening to chronic-disease workups.
- Screening clinics, occupational health, and DOT-physical providers.
- Multi-doctor groups using FDT for triage and HFA bowl for confirmation.
- Buyers wanting Humphrey brand recognition without the cost of a full HFA bowl perimeter.
Technical Specifications
| Specification | Detail |
| Type | Frequency Doubling Technology (FDT) perimeter |
| Test protocols | C-20 (~4 min screening), N-30 (~5 min threshold) |
| Stimulus | Low-spatial / high-temporal-frequency sinusoidal gratings |
| Display | Compact LCD (no bowl required) |
| Patient response | Hand-held response button |
| Form factor | Compact tabletop |
| Manufacturer | Zeiss / Humphrey (USA) |
| Condition | Refurbished |
| Warranty | 6-month DEC warranty on parts and workmanship |
Compare Visual Field Testing Options
Where this FDT 710 fits in DEC’s perimeter inventory:
| Model | Type | Brand | Price | Notes |
| Oculus Easyfield | FDT screening | Oculus | $1,650 | Oculus FDT alternative — in stock |
| Humphrey 710 (HFA bowl) | Bowl perimeter | Zeiss | $1,650 | HFA entry tier — in stock |
| Humphrey FDT 710 Refurbished | FDT screening | Zeiss | $3,700 | Humphrey FDT — this listing |
| Humphrey 740i Refurbished | Bowl perimeter (full SITA) | Zeiss | $7,125 | HFA 740i with full SITA — premium tier |
Similar Visual Fields Analyzers In Stock Now
Need a comparable visual fields analyzer available today? These units are in stock and ready to ship with a 90-day Digital Eye Center warranty.
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