ZEISS HFA3
ZEISS · Model HFA3
Reduced visual field testing time with SITA™ Faster Reduced setup time with a single trial lens. Using liquid pressure, the Liquid Trial Lens™ instantly delivers each patient's refractive correction with the touch of a button Improve confidence in test results with ReIEYE™. Instantly review the patient's eye position, at any stimulus point Simplify operation with the intuitive SmartTouch™ interface that novice users will appreciate Gain peace of mind with seamless transferability of legacy data from the HFA II and HFA II-i to the HFA3 SITA Faster test is about the time of SITA Standard and 70% of SITA Fast with the same reproducibility as the SITA Fast. Mixed GPA allows free mixing of SITA Faster, SITA Fast and SITA Standard and allows full access to the patient's progression analysis including all SITA tests.
Key tips
- ·Verify laser output with a real power meter, not the unit's own display - the display can drift independently of true output.
- ·Take "the image looks a little off" reports seriously - optical alignment drift is usually gradual, not sudden.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Optical / illumination fault
MediumSymptoms: Dim, uneven or no illumination; poor or hazy view; slit / filters not working.
Root cause: Bulb / LED at end of life, a power-supply fault, or contaminated optics.
Alignment / positioning-stage fault
MediumSymptoms: Joystick or slide binds, will not hold position, chin-rest / head-rest drive faults.
Root cause: Worn stage bearings / slides or a positioning-drive fault.
Measurement / capture fault
MediumSymptoms: Reading errors (tonometer / autorefractor / lensmeter), no or poor image capture (fundus / OCT), calibration fails.
Root cause: Sensor / camera fault, a calibration issue, or contaminated measurement optics.
Printer / PC / connectivity fault
LowSymptoms: No printout, images / data will not save or transfer.
Root cause: Built-in printer, the PC, or the network / EMR interface.
Motorised table / chin-rest fault (where fitted)
LowSymptoms: Instrument table or chin-rest will not raise / lower.
Root cause: Table / chin-rest actuator or its switch.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Illumination bulb / LED module
Class Frequent wear itemRel. cost $$R&R Fairly easy
Positioning-stage bearings / slides
Class Major service partRel. cost $$R&R Moderate
Measurement sensor / camera module
Class Major service partRel. cost $$$R&R Moderate
Built-in printer / paper
Class Periodic replacementRel. cost $R&R Fairly easy
Chin-rest / table actuator
Class Major service partRel. cost $$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Illumination bulb / LED module | Frequent wear item | $$ | Fairly easy |
| Positioning-stage bearings / slides | Major service part | $$ | Moderate |
| Measurement sensor / camera module | Major service part | $$$ | Moderate |
| Built-in printer / paper | Periodic replacement | $ | Fairly easy |
| Chin-rest / table actuator | Major service part | $$ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Optical alignment / calibration check
- ·Lamp or laser output verification
- ·Annual full PM
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Optical / illumination fault (dim, uneven, no illumination; slit / filters not working)
- Replace the bulb / LED module with the correct type and wattage.
- Check the power supply and the brightness / rheostat control.
- Clean the illumination and viewing optics per the manual.
- Confirm the slit, filters and apertures operate.
- Replace the power supply if output is still low.
Symptom: Alignment / positioning-stage fault (joystick or slide binds, chin-rest drive)
- Check the stage ways for debris or dried grease.
- Inspect the stage bearings / slides for wear.
- Check the chin-rest / table actuator and its switch.
- Re-lubricate or replace the stage / drive kit.
- Confirm smooth motion and that it holds position.
Symptom: Measurement or capture fault (reading errors, calibration fails, poor image capture)
- Run the instrument self-test / calibration.
- Clean the measurement window / objective.
- Verify against a model eye / test target where one exists.
- Confirm patient positioning and fixation.
- Refer the sensor / camera module if calibration will not hold.
Symptom: Printer / PC / connectivity fault
- Check the built-in printer and paper.
- Confirm the PC, network and EMR interface settings.
- Restart the software and the instrument.
- Send a test result.
- Escalate a persistent interface fault to the OEM.
Technical Specs
- Height
- 23 in
- Length
- 18 in
- Weight
- 63
- Width
- 20 in
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Eye clinic / ophthalmology suite
- Operating Room (ophthalmic surgery)
Documents & Manuals
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