Description
What’s Included
- Haag-Streit BQ 900 slit lamp main unit
- Haag-Streit AT 900 Goldmann applanation tonometer (mounted)
- Tonometer prism(s)
- Slit lamp table and patient chin/forehead rest assembly
- Power cable and accessories
- 90-day Digital Eye Center warranty
Condition & Warranty
Used. This Haag-Streit BQ 900 slit lamp with AT 900 tonometer has been tested and is in good working order; clean, calibrated, optics clean, and lamp lubricated. The unit shows some visible signs of usage; note that the lamp has a yellowish color (cosmetic only — does not affect optical function or performance). See pictures. Covered by a 90-day warranty on parts and workmanship.
Haag-Streit BQ 900 Slit Lamp with AT 900 Tonometer — Used Gold-Standard Anterior Segment Examination System
The Haag-Streit BQ 900 paired with the AT 900 applanation tonometer is the definitive clinical slit lamp and IOP measurement combination — the same pairing found in teaching hospitals, glaucoma subspecialty practices, and academic eye centers worldwide. This used Haag-Streit BQ 900 with AT 900 delivers the precision illumination optics, 5-step magnification system, and Goldmann applanation accuracy that ophthalmologists and optometrists have relied on as the benchmark for anterior segment examination for decades. For practices that demand Swiss optical quality and the tonometry gold standard in a single package, this BQ 900 + AT 900 combination delivers both at used-equipment pricing.
Clinical evidence published by the National Library of Medicine confirms that Goldmann applanation tonometry remains the international gold standard for intraocular pressure measurement — and the Haag-Streit AT 900, mounted on the BQ 900 slit lamp, is the instrument on which that standard was established and is still validated in clinical research today.
Key Features of the Haag-Streit BQ 900 with AT 900
- Haag-Streit BQ 900 slit lamp optics — Swiss-made Jenoptik optics with a parfocal, wide-field binocular system; premium illumination and image quality that define the standard in clinical slit lamp examination
- 5-step magnification system — 6×, 10×, 16×, 25×, and 40× magnification steps provide the range needed from routine anterior segment screening to detailed corneal endothelium and trabecular meshwork examination
- AT 900 Goldmann applanation tonometer — the tonometer on which IOP measurement normative data is based; the reference instrument for glaucoma diagnosis, IOP target setting, and treatment monitoring in clinical practice and research
- Integrated slit lamp + tonometer system — AT 900 mounts directly to the BQ 900 slit lamp table; IOP measurement and anterior segment examination in a single patient encounter without instrument switching
- Precision slit beam control — fully adjustable slit width, height, and angle; cobalt blue filter for fluorescein examination; red-free filter for corneal vascularization assessment
- Stable base and joystick control — counterbalanced joystick and smooth X-Y-Z movement for precise alignment during detailed corneal and lens examination
- Durable Swiss construction — BQ 900 is built for decades of clinical use; used units retain the optical quality and mechanical precision of the original instrument
Clinical Applications
- Glaucoma diagnosis and IOP monitoring — Goldmann AT 900 provides the IOP readings on which glaucoma diagnosis, target pressure setting, and treatment decisions are based; most accurate IOP measurement method in clinical use
- Anterior segment examination — cornea, anterior chamber, iris, and crystalline lens evaluation for cataract grading, corneal disease management, and surgical planning
- Contact lens evaluation and fitting — slit beam, cobalt blue filter, and fluorescein pattern assessment for rigid and scleral contact lens fit evaluation
- Post-operative monitoring — anterior chamber assessment, wound integrity, IOL position, and IOP measurement after cataract surgery, corneal transplant, and glaucoma surgery
- Uveitis examination — anterior chamber cell and flare grading, keratic precipitate characterization, and posterior synechiae assessment under high magnification
- Corneal disease management — epithelial defect mapping, stromal infiltrate depth assessment, endothelial examination, and fluorescein staining pattern interpretation
Who This Is For
- Glaucoma specialists — Goldmann AT 900 is the IOP measurement standard for glaucoma subspecialty practice; the BQ 900 provides the optics for gonioscopy, disc evaluation, and anterior segment assessment in the same instrument
- Comprehensive ophthalmologists — the BQ 900 + AT 900 combination covers the full scope of anterior segment examination and IOP measurement for general ophthalmology practice
- Cornea and anterior segment specialists — BQ 900 optics provide the resolution and illumination flexibility required for detailed corneal disease evaluation and surgical follow-up
- Optometry practices requiring premium IOP accuracy — for practices where IOP measurement precision directly affects glaucoma referral and co-management decisions, Goldmann AT 900 remains the benchmark
Technical Specifications
| Spec | Detail |
| Manufacturer | Haag-Streit (Switzerland) |
| Slit Lamp Model | BQ 900 |
| Tonometer Model | AT 900 (Goldmann applanation) |
| Magnification Steps | 5-step: 6×, 10×, 16×, 25×, 40× |
| Illumination | Halogen slit illumination with full beam adjustment |
| Filters | Cobalt blue, red-free, heat-absorbing |
| IOP Measurement Range | 0–80 mmHg (Goldmann standard) |
| Tonometer Prism | Standard Goldmann 7 mm applanation prism |
| Condition | Used |
| Warranty | 90 days |
Compare Haag-Streit BQ 900 Configurations
| Configuration | Tonometer | Fundus Module | Condition | Price |
| BQ 900 + Fundus Module 300 | No | Yes | Used | $14,300 |
| BQ 900 + AT 900 (this unit) | Yes (Goldmann) | No | Used | $9,900 |
| BQ 900 Slit Lamp Only | No | No | Used | $9,400 |
| BM 900 + AT 900 | Yes (Goldmann) | No | Used | $8,800 |
Questions about the Haag-Streit BQ 900 with AT 900? Contact us — we can confirm tonometer prism count, illumination type, and financing options.














