Every optical instrument built since the 17th century is built on that principle. Fermat is building instruments that take the fastest path to what matters — getting the right information to the right eyes at the right moment.
25× optical zoom, stable at surgical magnification. No competitor has solved the stability problem at this scale — the image doesn't drift when the surgeon's hand moves, when the patient breathes, or when instruments pass through the field.
The zoom is optical, not digital. No resolution loss. No latency introduced by image processing. The surgeon sees more — with the same fidelity as the naked eye, only closer.
Real-time CT and MRI overlay — registered to the patient, projected into the surgeon's field of view. The vasculature, the margins, the anatomical structures beneath the surface, all visible before the first incision.
Less than 12ms latency. The overlay moves with the patient. The surgeon's gaze never leaves the field to check a separate screen.
The Fermat headset is an instrument — worn by the surgeon, not positioned by a technician. It moves with the surgeon's head. No additional floor space. No repositioning mid-procedure. No separate operator.
Every dimension is designed around the surgeon's anatomy, range of motion, and the duration of a surgical procedure.
| Optical Zoom | 25× · Optical, not digital · No resolution loss |
| Overlay Sources | CT · MRI · Pre-operative and intra-operative registration |
| Overlay Latency | <12ms · Real-time patient motion compensation |
| Display Resolution | 4K per eye · True surgical field fidelity |
| Form Factor | Worn · Head-mounted · No floor footprint |
| Sterility | Full surgical field sterile drape · Reusable optics module |
| Integration | DICOM compatible · Works with existing imaging systems |
| Weight | Engineered to OR procedure duration · Details on request |
In most operating rooms today, the surgeon's primary information source is direct vision — supplemented by a monitor across the room displaying pre-operative imaging captured hours or days before the procedure.
The gap between what the surgeon can see and what they need to know is bridged by experience, inference, and tacit knowledge built over years of training. This gap is real, consequential, and addressable.
Fermat closes it. Not by adding another screen — by putting the information in the surgeon's field of view, registered to the patient's anatomy in real time.
The relationship between intraoperative visualization quality and surgical outcomes is well-established across specialties. Improved visualization is associated with reduced inadvertent injury, improved margin achievement, and reduced re-intervention rates.
Fermat's clinical validation program is designed to quantify these relationships specifically in the context of 25× optical zoom combined with real-time CT overlay — the combination no prior instrument has delivered.
You put on the Fermat headset before you scrub. By the time you're at the table, the CT is registered to the patient. The overlay is in your field of view. Your gaze never leaves the surgical field.
The vasculature is visible before you dissect near it. The margin is defined before you make the resection decision. The structure you need to avoid is labeled before you're working adjacent to it.
No one needs to move a monitor. No one needs to call up an image. The information you used to reach for is already there — in your eye, in your field, before you need it.
Most surgical technology has done the opposite. Monitors, robotic consoles, fluoroscopy systems, imaging carts — all of them put more distance, more equipment, more noise between the surgeon and the patient.
Fermat was founded on the belief that this is a design failure, not an inevitability. That the operating room can be redesigned — from a construction site full of heavy, impersonal equipment into a meditative space where technology serves rather than competes.
We begin with the headset. Because the most immediate failure in surgical visualization is that the information the surgeon needs is on a screen across the room, not in their field of view. We fix that first. The rest follows.
In 1662, the French mathematician Pierre de Fermat described something that seems simple and is actually profound: light doesn't take the shortest path between two points. It takes the fastest path.
This is Fermat's Principle of Least Time. It became one of the foundational laws of optics. Every optical instrument ever built is built on this principle — including ours.
We named the company after it because the principle is our design constraint: find the fastest path to what matters. Get the right information to the right surgeon at the right moment, with the least friction and the least delay.
The global surgical instruments market exceeds $14 billion annually. The surgical visualization segment — the specific category Fermat is creating within it — is nascent. No incumbent owns it. No product currently delivers what Fermat delivers.
The go-to-market is the surgeon. Surgeons choose their instruments — one of the few areas of hospital purchasing that remains physician-directed. Hospital systems follow surgeon preference. This is the highest-leverage adoption path in the category.
25× optical zoom in a head-mounted surgical instrument introduces a stability problem that has prevented this category from existing: at high magnification, any small movement — a heartbeat, a breath, a hand tremor — produces a large image displacement that makes the view unusable.
Fermat has solved this. The optical and computational stabilization system in the Fermat headset delivers 25× zoom that is stable enough to operate with. No competitor has demonstrated parity at surgical magnification. This is the foundational technical moat.
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investors@fermat.health