Method and device for measuring intraocular distance and structure through laser ray tracing

By employing laser beam tracking measurement methods and utilizing frequency shifting and filtering techniques with crossed laser beams, the problems of insufficient accuracy in intraocular distance measurement and patient discomfort in existing technologies have been solved. This enables high-precision calculation of lens position and tilt, supporting accurate positioning of the artificial lens.

CN121079022APending Publication Date: 2025-12-05TRACEY TECH LLC
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Patent Information

Application Number
CN202380090854.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-11-30
Filing Date
2023-11-30
Publication Date
2025-12-05

AI Technical Summary

Technical Problem

Existing technologies have limitations in terms of accuracy and patient discomfort when measuring the distance and position of the lens inside the eye, especially when using optical coherence tomography (OCT) to make it difficult to accurately suture and image under conditions of rapid eye movement.

Method used

The laser beam tracking measurement method is used to detect the inside of the eye along an optically determinable path by configuring intersecting laser beams. Backscattered signals are detected by using laser carrier frequency offset and filtering technology, the position and trajectory of the beam intersection point are calculated, and the intraocular distances and structures are measured by combining the triangulation principle.

Benefits of technology

It achieves high-precision, painless intraocular distance and structural measurements, and can accurately calculate the tilt and position of the lens, providing parameter support for artificial lens replacement.

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Abstract

A method and apparatus for laser ray tracing measurements of intraocular distances and structures are provided herein. Generally, the device has a laser, a pair of acousto-optic deflectors, a driver, a frequency generator and beam splitter, a telescope and collimating lens, a base optometric channel and a processing unit, and is arranged and configured to detect the eye with a modulated laser beam oriented to intersect along an optically determinable path. Analysis of detectable backscattered radiation is used to confirm the position of the beam intersection and to calculate its distance to the corneal vertex. The data obtained by repeated probing is used to reconstruct the intraocular structure of the eye.
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