Description
What’s Included
- Haag-Streit BQ 900 LED Slit Lamp
- Haag-Streit AT 900 Applanation Tonometer (Model BQ)
- Power cable
- 90-day Digital Eye Center warranty
Condition & Warranty
Used. Tested before listing and ready for clinical use on arrival. The unit has been cleaned and may show minor cosmetic wear consistent with prior clinical use; the optical system, LED illumination, mechanical controls, and AT 900 applanation tonometer were verified operational. Covered by a 90-day warranty on parts and workmanship.
Haag-Streit BQ 900 LED Slit Lamp — Used Biomicroscope with AT 900 Tonometer
The Haag-Streit BQ 900 LED Slit Lamp is a premium biomicroscope built for detailed anterior and posterior segment examination. Its Galilean stereo microscope delivers five fixed magnification steps from 6.3× to 40×, while the LED illumination system produces a bright, homogeneous slit for high diagnostic detail from the cornea through the retina. Precision Swiss mechanics and high-grade optics make the Haag-Streit BQ 900 LED Slit Lamp a dependable workhorse for demanding practices.
The included Haag-Streit AT 900 (Model BQ) is a Goldmann-principle applanation tonometer for fast, reproducible intraocular pressure (IOP) readings. It mounts directly on the microscope arm and is read through the right eyepiece, keeping tonometry integrated into the slit lamp exam. A clinical concordance study published in the National Library of Medicine confirms that Goldmann applanation remains the reference standard for IOP measurement.
Why Practices Choose the BQ 900
- Bright LED illumination — a sharp, homogeneous slit with consistent color temperature and no bulb changes over the life of the instrument.
- Five-step Galilean optics — 6.3×, 10×, 16×, 25× and 40× magnification cover screening through fine corneal and lens detail.
- Integrated Goldmann tonometry — the AT 900 mounts on the microscope arm for reproducible IOP readings without moving the patient.
- Swiss precision mechanics — a smooth joystick and steady base give repeatable focus and alignment across the full magnification range.
- Wide slit control — continuously variable slit width and length plus fixed apertures and blue, red-free and grey filters for versatile viewing.
- High light transmission — apochromatic optics deliver a detail-rich, high-contrast clinical view.
- Upgrade path — accepts Haag-Streit imaging accessories such as a beam splitter for teaching and photo-documentation.
See the Haag-Streit BQ 900 in Action
This short demonstration from Haag-Streit shows the BQ 900’s LED illumination and the sharp, homogeneous slit it produces.
Clinical Applications
- Routine anterior segment examination of the lids, conjunctiva, cornea, iris and lens.
- Goldmann applanation tonometry for glaucoma screening and IOP monitoring.
- Posterior segment evaluation with an auxiliary fundus or Hruby lens.
- Contact lens fitting assessment and dry eye / tear film evaluation.
- Documentation of corneal pathology, cataract grading and post-operative follow-up.
Who This Is For
- Ophthalmology and optometry practices that want a premium, long-lasting primary slit lamp.
- Glaucoma clinics that rely on integrated Goldmann applanation tonometry.
- Teaching institutions and residency programs needing dependable, high-resolution optics.
- Practices upgrading from a halogen slit lamp to maintenance-free LED illumination.
Technical Specifications
| Specification | Detail |
| Instrument type | LED slit lamp biomicroscope |
| Manufacturer | Haag-Streit |
| Model | BQ 900 |
| Microscope | Galilean stereo microscope |
| Magnification | 6.3×, 10×, 16×, 25×, 40× (5-step changer) |
| Stereo angle | 13° |
| Eyepiece magnification | 12.5× |
| Eyepiece adjustment | +7 to −7 D |
| Interpupillary distance | 52–78 mm |
| Illumination | LED |
| Slit width | 0–14 mm continuously variable |
| Slit length | 1–14 mm continuous + fixed apertures |
| Illumination field | Ø 8 / 5 / 3 / 2 / 1 / 0.2 mm |
| Slit rotation | ±90° |
| Filters | Blue, red-free (green), grey |
| Tonometer | Haag-Streit AT 900 Model BQ |
| Tonometer type | Goldmann applanation |
| IOP measurement range | 0–80 mmHg |
| Condition | Used |
| Warranty | 90-day Digital Eye Center warranty |
Compare Haag-Streit Slit Lamp Options
| Feature | BQ 900 LED (this unit) | Haag-Streit BQ 900 | Haag-Streit BM 900 |
| Illumination | LED | Halogen | Halogen |
| Microscope | Galilean, 5-step | Galilean, 5-step | Kepler, 2-step |
| Magnification | 6.3×–40× | 6.3×–40× | 10× / 16× |
| Tonometer | AT 900 Goldmann | AT 900 Goldmann | AT 900 Goldmann |
| Condition | Used | Used | Used |
| Price | $13,750 | $9,900 | $8,800 |
Also consider the halogen Haag-Streit BQ 900, the compact Haag-Streit BM 900, or add a Stereo Variator beam splitter for teaching and imaging.
Questions about the Haag-Streit BQ 900 LED Slit Lamp? Contact us for availability and shipping details.
