Description
What’s Included
- Haag Streit BM 900 slit lamp biomicroscope (halogen illumination, dual-column)
- Haag Streit 900 applanation tonometer (Goldmann-type)
- Power cable (as photographed)
- 90-day Digital Eye Center warranty
Condition & Warranty
Used. Tested before listing — halogen illumination confirmed at full intensity, slit-width control verified across the 0–8 mm range, both 10× and 16× magnification eyepieces verified, slit rotation ±90° verified, Haag Streit 900 tonometer prism mount and applanation force verified. Cleaned. Covered by a 90-day warranty on parts and workmanship.
Haag Streit BM 900 — Used Dual-Column Slit Lamp with Goldmann 900 Tonometer
The Haag Streit BM 900 is the workhorse dual-column slit lamp from Haag-Streit — the same 900-series mechanical platform that powers the BD 900 single-column and BQ 900 premium variants. Paired here with the integrated Haag Streit 900 (Goldmann-type) applanation tonometer, this used haag streit bm 900 + tonometer combo delivers the gold-standard slit-lamp + IOP workflow at a sub-$6K used price point.
The BM 900 uses a convergent stereoscopic microscope at a 13° stereo angle for sharp depth-cued anterior-segment views. Magnification is 10× and 16× via the standard Haag-Streit two-step turret. Slit width is continuously variable from 0 to 8 mm; slit length is 1 to 8 mm continuous plus fixed apertures. Built-in filter set includes blue (cobalt), red-free (green), and 10% grey. The slit image can be rotated ±90°, with horizontal swivel ±90° and vertical 0 to 20°.
According to a National Library of Medicine-indexed study (Can J Ophthalmol, 2015), yellow- and blue-filtered fluorescein imaging produces clinically superior conjunctival and corneal staining contrast — the standard slit-lamp biomicroscopy workflow the BM 900 was designed for.
Why Practices Choose the BM 900
Gold-standard Haag-Streit optics — the BM 900 mechanical platform is the most-cloned slit-lamp design in ophthalmology; widely supported by independent service.- 2-step magnification (10× and 16×) — the workhorse magnifications for routine biomicroscopy. Short observer-to-patient distance keeps the operator close to the slit and patient.
- Convergent stereoscopic 13° stereo angle — sharp depth perception across the cornea, anterior chamber, lens, and anterior vitreous.
- Continuously variable slit (0–8 mm width, 1–8 mm length) + fixed apertures for circular spots.
- Built-in filter set — blue (cobalt) for fluorescein, red-free (green) for vessels and RNFL, 10% grey for photophobic patients.
- ±90° slit rotation — adjust slit orientation for optic-section, conic, or sclerotic-scatter techniques.
- Integrated Haag Streit 900 tonometer — Goldmann-type applanation tonometry on the same instrument; the clinical reference standard for IOP measurement.
- Halogen reliability — the halogen platform is widely-stocked for replacement bulbs vs. proprietary LED modules.
Clinical Applications
- Routine slit-lamp biomicroscopy — full anterior-segment evaluation including cornea, iris, lens, and anterior vitreous.
- Goldmann applanation tonometry — gold-standard IOP measurement for glaucoma evaluation and follow-up.
- Corneal disease grading — staining patterns (fluorescein with cobalt), opacities, abrasions, ulcers, and post-surgical wounds.
- Glaucoma anterior-chamber assessment — slit-beam evaluation of AC depth, pigment dispersion, pseudoexfoliation, plus AT 900 IOP.
- Cataract grading — direct illumination, retroillumination, and sclerotic scatter for nuclear, cortical, and PSC assessment.
- Vitreoretinal contact-lens biomicroscopy — Goldmann or Volk indirect lenses for posterior-segment evaluation.
Who This Is For
- Optometry and general ophthalmology practices that want the Haag-Streit gold-standard slit-lamp + Goldmann tonometer combo at a sub-$6K used price.
- Multi-doctor groups standardizing on the Haag-Streit 900 platform across BD/BM/BQ tiers for consistent service and parts.
- Practices replacing an older non-Haag-Streit slit lamp + standalone tonometer setup with an integrated solution.
- Clinicians who prefer halogen illumination for predictable color rendition and lower long-term consumable cost than LED modules.
Technical Specifications
| Specification | Detail |
| Type | Dual-column halogen slit lamp biomicroscope + Goldmann applanation tonometer |
| Magnification | 10× and 16× (2-step turret) |
| Stereo angle | 13° (convergent stereoscopic) |
| Slit width | 0–8 mm continuously variable |
| Slit length | 1–8 mm continuous + fixed apertures |
| Slit rotation | ±90° |
| Swivel range | Horizontal ±90°; vertical 0–20° |
| Filters | Blue (cobalt), red-free (green), 10% grey |
| Tonometer | Haag Streit 900 (Goldmann-type applanation) |
| Manufacturer | Haag-Streit AG (Switzerland) |
| Condition | Used — tested before listing |
| Warranty | 90-day DEC warranty on parts and workmanship |
Compare Haag-Streit Slit Lamp Options
Where this BM 900 + 900 Tonometer fits in DEC’s slit-lamp inventory:
| Model | Architecture | Illum | Magnification | Tonometer | Price | Notes |
| BM 900 + HS 900 Tono | Dual-column | Halogen | 10× / 16× | HS 900 Goldmann | $5,500 | Workhorse — this listing |
| BD 900 + Rolling Table | Single-column | Halogen | 10× / 16× | No | $7,700 | Single-column variant + table |
| BM 900 LED + AT 900 | Dual-column | LED | 5-step | AT 900 | $14,300 | Premium — LED + 5-step turret |
| Marco G5 Ultra + HS 900 | Dual-column | Halogen | 5-step | HS 900 | $5,500 | Marco brand alternative |
Looking for an LED upgrade with 5-step magnification? Step up to the BM 900 LED + AT 900. Want the single-column variant with rolling table instead? See the BD 900 + Rolling Table.
Questions about the Haag Streit BM 900? Contact us for current availability or accessories.
