Description
What’s Included
- Haag-Streit Stereo Variator module for the BQ 900 slit lamp
- 90-day Digital Eye Center warranty
Condition & Warranty
Used. Tested and in excellent working order, cleaned and ready to install on arrival. Some cosmetic signs of previous use may be present. Covered by a 90-day warranty on parts and workmanship.
Haag Streit Stereo Variator — Used BQ 900 Accessory
The Haag Streit Stereo Variator is an optional accessory for the Haag-Streit BQ 900 slit lamp. According to Haag-Streit, it changes the angle of stereoscopic observation from the standard 13° to 4.5°, which makes stereoscopic examination of the fundus, the peripheral retina and the vitreous easier even under unfavourable conditions such as high myopia and small pupils.
Reducing the convergence angle lets both observation paths pass through a smaller pupil together, so the stereoscopic field of view grows while depth information is kept. For a practice that already runs a BQ 900, this used haag streit stereo variator adds that posterior-segment capability at a fraction of the cost of a new module, with a 90-day warranty.
The slit lamp itself is a well-documented tool for posterior-segment work: a review indexed by the National Library of Medicine (SpringerPlus, 2015) describes the fundus slit lamp and its role in stereoscopic examination of the retina.
Why Practices Choose the Haag Streit Stereo Variator
Built by Haag-Streit for the BQ 900 microscope, the variator turns a routine slit-lamp lane into a stronger tool for posterior-segment viewing.
- Stereo angle from 13° to 4.5° — the manufacturer-specified range that keeps a stereoscopic view through a narrow pupil.
- Larger stereoscopic field — reducing the angle enlarges the stereo field of view while keeping depth information.
- Small pupils — helps when dilation is limited or not practical.
- High myopia — eases stereoscopic fundus viewing in highly myopic eyes.
- Vitreous and peripheral retina — extends useful stereo viewing beyond the posterior pole.
- Genuine Haag-Streit part — Swiss made, housing marked 900.7.5.6833, with a dedicated Stereo-Variator control knob.
- Cost-effective upgrade — adds an optional BQ 900 feature without replacing the slit lamp.
See the Haag Streit Stereo Variator in Action
This short demo from Haag-Streit explains how the stereo variator changes the stereoscopic view for challenging examinations.
Clinical Applications
- Stereoscopic fundus examination through small pupils
- Evaluation of the peripheral retina at the slit lamp
- Vitreous assessment — opacities, strands and posterior vitreous detachment
- Posterior-segment examination in highly myopic patients
- Teaching the effect of stereo angle on biomicroscopic depth perception
Who This Is For
- Practices running a Haag-Streit BQ 900 that want the optional stereo variator
- Retina-focused clinicians who examine the fundus at the slit lamp
- Teaching clinics and residency programs using the BQ 900 platform
- Buyers completing a used BQ 900 setup with genuine Haag-Streit accessories
Technical Specifications
| Spec | Detail |
| Type | Stereo Variator module (slit-lamp microscope accessory) |
| Function | Changes the stereoscopic observation angle from 13° to 4.5° |
| Intended use | Stereoscopic fundus, peripheral retina and vitreous examination; high myopia and small pupils |
| Compatibility | Haag-Streit BQ 900 slit lamp |
| Housing marking | Haag-Streit, Swiss made, 900.7.5.6833 |
| Manufacturer | Haag-Streit |
| Condition | Used — tested, cleaned |
| Warranty | 90 days (parts and workmanship) |
Compare BQ 900 Posterior-Segment Options
| Feature | Stereo Variator (this listing) | Haag-Streit Fundus Module 300 | BQ 900 w/ AT 900 & Stereo-Variator |
| Type | Microscope accessory | Fundus imaging attachment | Complete slit lamp with tonometer |
| Main purpose | Narrower stereo angle for fundus viewing | Fundus image capture | Full exam lane, variator already fitted |
| Works with | BQ 900 | BQ 900, BM 900, BP 900, BI 900 | Stand-alone unit |
| Needs an existing slit lamp | Yes | Yes | No |
| Condition / Warranty | Used / 90 days | New / 90 days | Used / 90 days |
| Price | $1,177 | $5,775 | $10,450 |
Need to add photo or video capture to your BQ 900? See the Haag-Streit Beam Splitter Set for BQ900/BX900. Don’t have a BQ 900 yet? See the used BQ 900 with AT 900 Tonometer, or upgrade your lamp’s illumination with the OptiLight LED Conversion Kit.
Questions about the Haag Streit Stereo Variator? Contact us to confirm fit with your BQ 900 before purchase.
