The Eye Stuff Group Replaces P/N: HU-266002-1106-082
Visual Field Projector Replacement Bulb
Instruction Manual
Introduction and Overview
This manual provides essential information for the installation, operation, and maintenance of your The Eye-Stuff Group Visual Field Projector Replacement Bulb. This 12V Halogen Lamp with a light socket is a critical component designed to ensure the continued accuracy and performance of your compatible Humphrey Zeiss HFA and HFAi visual field analyzers.
The bulb features gold-plated circuits for optimal connectivity and enhanced protection against corrosion, contributing to its long-term performance. Engineered in Germany by OSRAM, this replacement bulb meets high standards of quality and reliability, ensuring a proper fit and seamless integration with your equipment.
Compatibility
This replacement bulb assembly is a direct fit for a wide range of Humphrey Zeiss HFA and HFAi models, as well as the Zeiss Stratus 3000.
Compatible Humphrey Zeiss HFA/HFAi Models:
- 720, 730, 735, 740, 745, 750
- 720i, 735i, 740i, 745i, 750i
- 830, 840, 850, 860
Additionally, it serves as a direct replacement for the flashbulb in the Zeiss Stratus 3000.
Installation (Setup)
Replacing the projector bulb requires careful handling. Always refer to your specific Humphrey Zeiss HFA or Zeiss Stratus 3000 user manual for detailed, model-specific bulb replacement procedures. The following are general guidelines:
- Safety First: Ensure the visual field analyzer is powered off and unplugged from the electrical outlet. Allow the unit and the old bulb to cool down completely before proceeding, as halogen bulbs can become very hot.
- Locate the Bulb: Identify the projector bulb compartment on your visual field analyzer. This location varies by model.
- Remove Old Bulb: Carefully remove the old bulb assembly. Avoid touching the glass part of the bulb with bare hands, as oils can reduce its lifespan. Use gloves or a clean cloth if direct contact is unavoidable.
- Insert New Bulb: Gently insert the new The Eye-Stuff Group replacement bulb into its socket. Ensure the prongs align correctly and the bulb is seated firmly. Do not force it.
- Secure Compartment: Close and secure the bulb compartment according to your device's instructions.
- Power On and Test: Plug in and power on your visual field analyzer. Perform a test to ensure the new bulb is functioning correctly and providing consistent illumination.

Image: The Eye-Stuff Group HFA Projector Bulb, showing the bulb assembly and its white packaging box. The packaging indicates "Made in Germany" and features the ESG logo.

Image: Multiple views of the HFA Projector Bulb, illustrating its physical dimensions. The bulb measures approximately 1-7/8 inches in height and 1 inch in width, providing a visual reference for its compact size.
Operation
The Visual Field Projector Replacement Bulb functions as the light source within your Humphrey Zeiss HFA or Zeiss Stratus 3000 unit. Its primary role is to provide consistent and accurate illumination necessary for precise visual field testing and calibration.
Once installed, the bulb operates automatically as part of the analyzer's system. It is designed to deliver a maximum projection intensity of less than 10V and features flicker-free operation, which is crucial for reliable diagnostic results.
Maintenance
Proper handling and minimal maintenance can help maximize the lifespan and performance of your replacement bulb:
- Handling: Always handle the bulb by its base or socket. Avoid touching the glass envelope directly with bare hands. Oils from your skin can create hot spots on the glass, leading to premature failure. If the glass is accidentally touched, gently wipe it with a clean, lint-free cloth moistened with rubbing alcohol.
- Cleaning: The bulb itself generally does not require cleaning during normal operation. If dust accumulates on the exterior, gently wipe it with a dry, soft, lint-free cloth.
- Storage: If not immediately installed, store the bulb in its original protective packaging in a cool, dry place to prevent damage and contamination.
- Lifespan: The average life of this halogen bulb is approximately 50 hours. Regular monitoring of your HFA unit's performance will indicate when a replacement is necessary.

Image: A detailed close-up of the HFA Projector Bulb's metal base, clearly showing the "Made in Germany" engraving, highlighting its origin and manufacturing quality.

Image: A close-up of the HFA Projector Bulb's internal filament, which is the light-emitting component. This view emphasizes the precision engineering of the bulb's core.
Troubleshooting
If you encounter issues after installing the new bulb, consider the following common troubleshooting steps:
- Bulb Not Lighting:
- Ensure the visual field analyzer is properly plugged in and powered on.
- Verify that the bulb is correctly seated in its socket and the compartment is securely closed.
- Check the HFA unit's display for any error messages related to the light source.
- If the old bulb also failed, there might be an issue with the HFA unit's power supply or internal circuitry. Consult your HFA unit's service manual or a qualified technician.
- Dim or Inconsistent Light:
- Re-seat the bulb to ensure optimal contact with the gold-plated circuits.
- Check for any dust or debris on the bulb's glass or within the light path of the HFA unit.
- If the bulb is nearing its average lifespan (50 hours), its brightness may naturally diminish. Consider replacing it.
- Consult your HFA unit's manual for calibration procedures or light intensity adjustments.
For complex issues, always refer to the official service manual for your specific Humphrey Zeiss HFA or Zeiss Stratus 3000 model or contact a certified service professional.
Product Specifications
| Brand | The Eye Stuff Group |
| Model Number | Replaces P/N: HU-266002-1106-082 |
| Light Type | Halogen |
| Voltage | 12 Volts |
| Wattage | 30 Watts |
| Bulb Shape Size | T3 |
| Bulb Base | Prong |
| Light Color | White |
| Color Temperature | 3300 Kelvin |
| Brightness | 30 Millicandela |
| Special Feature | Flicker-Free |
| Average Life | 50 Hours |
| Product Dimensions | 1.88 x 1 x 1 inches |
| Item Weight | 6.9 ounces |
| UPC | 196852030286 |

Image: An angled view of the HFA Projector Bulb's base, clearly displaying the "Made in Germany" mark and the text "REPLACEMENT ZEISS HFA Bulb" on the circuit board, confirming its intended use.

Image: The underside of the HFA Projector Bulb's circuit board, revealing the OSRAM model number "64260" and electrical specifications "12V 30W", confirming the bulb's technical details.
Warranty Information
The Eye-Stuff Group stands behind the quality and performance of all its products. This projector light bulb is guaranteed to be within the manufacturer's specifications, ensuring reliability and compatibility with your equipment.
For specific warranty terms and conditions, please refer to the product packaging or contact The Eye-Stuff Group directly.
Customer Support
Should you have any issues, questions, or require assistance with your Visual Field Projector Replacement Bulb, please do not hesitate to contact The Eye-Stuff Group customer support team.
Contact information can typically be found on the product packaging or on the official The Eye-Stuff Group website.
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