Optical Biometers
An optical biometer is the cornerstone instrument of modern cataract and refractive lens planning. Instead of an ultrasound probe, it uses non-contact light interference to capture the eye's key dimensions — axial length, keratometry, anterior chamber depth, lens thickness, corneal thickness, white-to-white and pupil size — in a single automated sequence, then feeds those values into the IOL power formulas your surgeons rely on. Because the measurement never touches the cornea, an optical biometer delivers more repeatable, more comfortable results than applanation ultrasound, which is why optical biometry has become the reference standard for intraocular lens calculation.
At US Ophthalmic we supply optical biometers to cataract surgeons, refractive practices and surgical centers across the United States, and we stand behind every unit with in-house technical support, a dedicated repair and spare-parts department, and a full US warranty. Rather than acting as a pass-through catalog, we help you match the right biometer to your surgical volume and case mix, then keep it calibrated and accurate for the life of the instrument. The Huvitz HBM-1 anchors this category, pairing OLCR optical biometry with built-in corneal topography in one workflow-friendly platform.
How to choose an optical biometer
- Measurement technology and cataract penetration: Optical biometers read axial length with light interference — commonly OLCR (optical low-coherence reflectometry) or swept-source OCT. The practical question is how the device performs on dense or posterior subcapsular cataracts, where the signal can drop out. Look for a dedicated dense-cataract or signal-boosting mode; the HBM-1's Dense Cataract Mode amplifies weak returns to recover axial length in advanced cases.
- All-in-one biometry plus topography: Some biometers only measure; others integrate corneal topography so you get keratometry and a full anterior-surface map from the same capture. A combined unit like the HBM-1, which adds a 24-ring Placido disc topographer, saves chair time and bench space versus running a separate topographer for astigmatism planning and keratoconus screening.
- IOL formula suite: Your calculation accuracy is only as good as the formulas on board. Confirm the biometer carries current-generation options — Barrett Universal II and True-K, Haigis, Hoffer Q, Holladay, SRK/T and toric or post-refractive formulas — so your team is not limited to older calculations for long, short or previously treated eyes.
- Parameters captured: For premium and toric IOL planning you want more than axial length and keratometry. Verify the device also measures anterior chamber depth, lens thickness, central corneal thickness, white-to-white and pupil diameter, all of which feed newer formulas and premium-lens decisions.
- Workflow, connectivity and EMR: A built-in touchscreen, fast automated capture and DICOM or EMR connectivity keep a busy clinic moving. Check how the biometer exports into your record system and IOL planning software so measurements flow without manual re-entry.
- Service, warranty and lifecycle support: A biometer is a multi-year investment, so support matters as much as specifications. New units arrive with full US warranty, while a quality-inspected refurbished unit can lower entry cost. Either way, confirm access to in-house technical support, calibration and genuine spare parts — the backbone of how we keep instruments accurate over time.
The HBM-1 optical biometer
US Ophthalmic carries the Huvitz HBM-1, an all-in-one optical biometer and corneal topographer built around OLCR biometry, Dense Cataract Mode and a modern IOL formula suite. Available configurations:
| Model | Type | Best for |
|---|---|---|
| Huvitz HBM-1 | All-in-one OLCR optical biometer with 24-ring Placido topography and Dense Cataract Mode | Cataract and refractive practices wanting biometry plus corneal topography in one unit |
| HBM-1 (Brasil configuration) | Regional configuration of the same HBM-1 optical biometer platform | Buyers sourcing the HBM-1 in a Brasil-market build |
Frequently asked questions
What does an optical biometer measure, and why is it used? An optical biometer measures the eye's optical dimensions — axial length, keratometry (corneal curvature), anterior chamber depth, lens thickness, corneal thickness, white-to-white and pupil size — without touching the eye. Those values drive the IOL power formulas used to select the intraocular lens implanted during cataract surgery, which makes the biometer central to achieving an accurate refractive outcome.
How is optical biometry different from ultrasound (A-scan) biometry? Ultrasound biometry uses a probe that either contacts the cornea (applanation) or sits in a fluid bath (immersion). Optical biometry is non-contact and generally more repeatable and comfortable, and it captures multiple parameters in one automated sequence. Ultrasound still has a role in eyes so dense or opaque that light cannot pass, which is why many practices keep an A-scan as a backup.
Can the HBM-1 measure axial length through dense cataracts? Yes. The HBM-1 includes a Dense Cataract Mode that amplifies weak light signals to recover axial length in advanced or posterior subcapsular cataracts, cases where standard optical readings can otherwise fail. In extremely opaque eyes, immersion ultrasound remains the fallback.
Does the HBM-1 replace a separate corneal topographer? For most practices, largely yes. Alongside optical biometry it includes a 24-ring Placido disc topographer that produces anterior corneal maps for astigmatism planning, keratoconus screening and toric IOL alignment, so many clinics consolidate two instruments into one. Highly specialized corneal work may still warrant a dedicated tomographer.
Should I buy a new or refurbished optical biometer? New units carry the latest software and a full US warranty, which most surgical practices prefer for a primary IOL-planning device. A quality-inspected refurbished biometer can be a cost-effective option for a second room or lower-volume clinic. In both cases US Ophthalmic backs the instrument with in-house service, calibration and spare parts — request a quote and we will advise based on your case volume.
