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Available now for research customers, the Theia T1 Investigational System is the world's first commercial handheld swept source OCT system. The T1 system consists of a cart-mounted OCT engine, a long and flexible tether, and a lightweight handheld probe that accepts various interchangeable lenses for imaging different regions of the eye (see available lens types below).

Please note, the T1 system has not been cleared by the FDA and is available only for investigational use with appropriate IRB and/or IACUC approvals.

Theia is currently developing a clinical device, based on the T1 system, that will be available once appropriate regulatory clearances have been obtained.  Please contact us for more details.

Theia Imaging T1 Investigational System
Example images from the T1 device: peripheral scan (A), macular scan (B), en face retina view (C) and pupil camera view (D).

Example images from the T1 Device with Standard Lens:
peripheral scan (A), macular scan (B), en face view (C) and pupil camera view (D).

Example images from the T1 Device with Widefield Lens:
widefield B-scan (A), en face view (B) and enlargement of macula (C).

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Leveraging next-generation swept source technology, the T1’s 300kHz A-scan rate provides an order of magnitude reduction in image acquisition time, simplifying image capture and enabling dense volume sampling, even with squirming subjects.



At under 350 grams (12 oz), the T1 imaging probe weighs in at less than a quarter of the weight of competitive devices, eliminating hand fatigue and providing an extra factor of safety for imaging delicate subjects.



The T1’s handheld probe features a revolutionary ergonomic design that simplifies image alignment. Infrared illumination eliminates the need for a bright, uncomfortable flash, minimizing patient discomfort and aversion.


Light source

 1060nm Swept Source Laser

Image acquisition speed

Up to 500 frames/second

Volume acquisition speed

up to 4 volumes/second

Optical Safety 

Compliant with ANSI z80.36-2021 (Group 1)

Axial resolution

6 microns (in tissue)

Imaging depth 

5.8 mm (in tissue) / 8.0 mm (in air)


Ultra-mobile cart with 10 foot (3m) tether length

Cart footprint

21” wide x 19” deep x 58” height (height adjustable)

Scan head weight

350 g (including lens)

Scan head footprint

6” x 4” x 2” (excluding tether)

Theia Imaging Standard Retinal Lens


  • 20mm working distance

  • 62 degree* FOV

  • 10µm lateral resolution

  • Optional integrated pupil camera (not compatible with interchangeable lens system)


Theia Imaging Widefield Retina Lens


  • 145 degree* FOV

  • 24µm lateral resolution

  • Requires corneal contact and coupling fluid (artificial tears)

  • Reusable contact tip (disposable option coming soon)


* FOVs are reported using the "eye angle" definition. Using a visual angle definition per ISO 10940, the standard lens has a 45 degree FOV and the widefield lens has a FOV of 110 degrees.


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