Description
Condition & Warranty
Used. This Haag-Streit BQ 900 Slit Lamp with AT 900 Tonometer and Stereo-Variator package has been fully inspected, optical-bench calibrated, and clinically tested. The legendary Swiss-engineered optics deliver unmatched light transmission, high-contrast resolution, and pristine visual clarity completely free of internal haze, dust, or scratches. The 5-step magnification drum shifts securely into every detent, and the omnidirectional joystick operates smoothly across all axes. The integrated Stereo-Variator angle-reduction system and beam splitting optical pathway operate flawlessly. The AT 900 applanation tonometer mechanism has been counterweight-verified for precise calibration responsiveness. The exterior housing shows minimal cosmetic wear as expected for pre-owned clinical equipment. Covered by a 90-day warranty on parts and workmanship.
Haag-Streit BQ 900 Slit Lamp — Used Flagship Workstation with AT 900 Tonometry
The Haag-Streit BQ 900 is universally acknowledged as the world’s premier flagship slit lamp, setting the gold standard in diagnostic biomicroscopy, ophthalmic photography, and vitreoretinal clinical research. Engineered with unmatched Swiss precision glass, the BQ 900 features a 5-step Galilean magnification changer ($6\times$, $10\times$, $16\times$, $25\times$, and $40\times$) with outstanding parfocality and stereoscopic depth of field.
This high-tier configuration includes the specialized Haag-Streit Stereo-Variator module. By reducing the stereoscopic angle from $13^\circ$ to $4.5^\circ$, the Stereo-Variator allows clinicians to maintain full stereoscopic visualization and enhanced depth perception through narrow, non-dilated pupils or when viewing the extreme peripheral retina. Combined with an integrated beam splitter for video or photographic documentation and the gold-standard Haag-Streit AT 900 applanation tonometer, this used BQ 900 workstation offers an elite, modular diagnostic platform for demanding ophthalmic practices.
Research published in the National Library of Medicine confirms that high-transmission Swiss optics combined with variable stereoscopic angle controls significantly increase diagnostic yield when evaluating small-pupil optic nerve heads and peripheral vitreoretinal pathology during Goldmann applanation tonometry.
Why Practices Choose the Haag-Streit BQ 900 & AT 900
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Flagship Swiss Galilean Optics — Industry-leading Swiss glass optics deliver maximum light transmission, zero chromatic aberration, and superior stereoscopic contrast
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Integrated Stereo-Variator Module — Reduces the optical viewing angle to $4.5^\circ$, facilitating full 3D stereoscopic views through small, non-dilated pupils and challenging peripheral retinal locations
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Built-in Optical Beam Splitter — Factory-integrated beam splitter allows seamless attachment of HD co-observation tubes or video/photographic imaging systems
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Authentic Haag-Streit AT 900 Tonometer — Mounts directly to the illumination tower, providing the world’s most trusted baseline metric for intraocular pressure (IOP)
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5-Step Rotary Magnification Changer — Rapid drum switcher offers comprehensive magnification ranges across $6\times$, $10\times$, $16\times$, $25\times$, and $40\times$
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Haag-Streit Tower Illumination — Top-mounted illumination tower provides full tilting capabilities and precision slit mechanism controls for advanced illumination techniques
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Fluid Single-Handed Control Joystick — Ultra-smooth mechanical joystick guarantees micro-fine horizontal alignment and fluid rotational height control
Clinical Applications
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Advanced Small-Pupil Posterior Segment Evaluation utilizing the Stereo-Variator to obtain clear stereoscopic views of the macula and optic disc without requiring full chemical dilation
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Goldmann-Standard Applanation Tonometry obtaining precise intraocular pressure measurements using the gold-standard AT 900 for accurate glaucoma management
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High-Magnification Corneal & Endothelial Inspection examining fine corneal dystrophies, nerve fibers, and surgical graft interfaces at up to $40\times$ magnification
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Ophthalmic Digital Documentation & Teaching utilizing the integrated beam splitter to output real-time optical signals to video cameras or co-observation teaching tubes
Who This Is For
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Glaucoma and Vitreoretinal Specialists requiring the absolute highest level of optical clarity, depth perception, and variable stereoscopic angles for difficult exams
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Academic Institutions and Surgical Centers seeking a modular, beam-splitter-equipped slit lamp ideal for video capture, co-observation, and resident training
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High-Volume Ophthalmic Practices investing in a durable, flagship-grade Swiss biomicroscope built for decades of continuous clinical excellence
Technical Specifications
| Specification | Detail |
| Model | Haag-Streit BQ 900 w/ AT 900 & Stereo-Variator |
| Type | Tower Illumination (Haag-Streit Style) Galilean Slit Lamp |
| Magnification Steps | 5-Step Rotary Drum Changer ($6\times$, $10\times$, $16\times$, $25\times$, $40\times$) |
| Special Module | Stereo-Variator (Reduces stereoscopic angle from $13^\circ$ to $4.5^\circ$) |
| Beam Splitter | Integrated optical beam splitter for imaging / co-observation |
| Eyepieces | $12.5\times$ focusing eyepieces |
| Slit Width / Length | Continuous adjustment from 0 to 14 mm |
| Filters | Cobalt Blue, Red-Free (Green), Neutral Density, Heat-Absorbing |
| Tonometer Model | Haag-Streit AT 900 (Model R or T) |
| Pressure Range | 0 to 80 mmHg |
| Condition | Used |
| Warranty | 90-day warranty on parts and workmanship |
