Zeiss HFA III Model 850 | Pre-owned visual field analyzer

• Test patterns supported: 24‑2, 30‑2, 10‑2, Macula, 60‑4, Nasal Step, custom kinetic, full threshold.
• SITA test strategies: SITA Standard, SITA Fast, SITA Faster, SITA‑SWAP.
• Visual Field Index (VFI™) automated output and Guided Progression Analysis™ (GPA™) software.
• DICOM‑compliant data transfer and export capability.
• Intended patient population: adults and children aged ≥6 years (with positioning assistance) — per manual.
• Physical environment: indoor, ≤10 hours/day typical use; user interface designed for sit‑down configuration.

The ZEISS HFA III Model 850 is part of the HFA 3 series of automated visual field analyzers designed to provide clinicians with high‑precision, reliable perimetry for the diagnosis, monitoring and management of ocular diseases such as glaucoma, retinal disorders and neuro‑ophthalmic pathologies. As a pre‑owned unit in excellent condition, this Model 850 presents a cost‑effective opportunity to acquire premium diagnostic technology without sacrificing performance or ROI.

Key ophthalmic features & workflow advantages

• First, the HFA III supports ZEISS’ SITA™ (Swedish Interactive Thresholding Algorithm) test strategies including SITA Standard, SITA Fast, and SITA Faster, enabling threshold testing that is faster, yet clinically valid, reducing patient fatigue and improving throughput. The Model 850 also supports the expanded 24‑2C test pattern, which adds 10 test points in the central 10 degrees of vision — highly relevant for early glaucoma detection.
• Integration with ZEISS’ Guided Progression Analysis™ (GPA™) and Visual Field Index™ (VFI™) helps clinicians detect changes over time in the visual field, alerting the user to statistically significant progression—critical for timely intervention. The SmartTouch™ interface on the unit enhances ease of use: after patient registration, the operator simply selects the name and presses “Start” — reducing chair time and operator training.

• The Model 850 includes a motorized chin/forehead rest assembly, patient response button, built‑in bowl for stimulus delivery and a high‑sensitivity photopic stimulus generator with variable background illumination. It supports kinetic and static perimetry options, accommodating full 180° test range when needed. Since it accepts legacy data from earlier HFA II / II‑i systems, it simplifies clinical transition.

• • Glaucoma screening and monitoring: The 24‑2, 30‑2, 10‑2, Macula and other test patterns let clinicians detect early field loss and monitor progression with high sensitivity.
• • Neuro‑ophthalmology: Custom kinetic and static tests, including custom isopters, allow assessment of visual field defects associated with optic nerve disease, ischemic events, or neurological disorders.
• • Retinal disease assessment: Though primarily a glaucoma device, the HFA III can supplement OCT and fundus imaging by quantifying functional field loss in retinal disease (for example advanced diabetic retinopathy or retinal vascular occlusions) via its standard test library and reports.
• • Research and Clinical Trials: The incorporation of DICOM compatibility and patient‑data export improves its utility in research settings.