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US 11,896,308 B2Granted
Miniaturized mobile, low cost optical coherence tomography system for home based ophthalmic applications
AssigneeAcucela Inc.
InventorsChristian Oggenfuss, Karim Haroud, Lukas Scheibler, Matthias Pfister, Urban Schnell, Stefan Troller, Ryo Kubota, Philip Buscemi
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Abstract
Improved optical coherence tomography systems and methods to measure thickness of the retina are presented. The systems may be compact, handheld, provide in-home monitoring, allow the patient to measure himself or herself, and be robust enough to be dropped while still measuring the retina reliably.
Claims22
An OCT system to measure an eye of a user, the OCT system comprising:
- a fixation target visible to the eye;
- an OCT interferometer configured to measure thickness of a retina of the eye;
- a plurality of light sources arranged to reflect from a cornea of the eye and generate a Purkinje image comprising reflections of the plurality of light sources from the cornea;
- a sensor to measure a position of the Purkinje image reflected from the cornea;
- a processor operatively coupled to the sensor to determine a position of the eye in response to the Purkinje image;
- and
- a user input operatively coupled to the processor to trigger a plurality of processor instructions;
- wherein a scanned region of the retina comprises dimensions across within a range from about 1 mm to about 3 mm and wherein a number of A-scans comprises from about 5000 A-scans to about 40,000 A-scans over a time within a range from about 0.5 seconds to about 3 seconds and wherein a safety pause is within a range from about 2 to 10 seconds.
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Dependencies are inferred from the claim text.