EPO Patent EP4710840A1: Method for Measuring Eye Axial Length

ChangeBridge: EPO Bulletin - Diagnosis & Surgery (A61B)

Published March 18th, 2026

Detected March 24th, 2026

Summary

The European Patent Office published patent application EP4710840A1 concerning a method and apparatus for measuring the axial length of an eye. The patent, assigned to SVision Imaging, Ltd, details a technique using optical images to determine anterior and posterior segment endpoints for accurate axial length measurement, even in cases of severe ophthalmic diseases.

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What changed

The European Patent Office (EPO) has published patent application EP4710840A1, detailing a novel method and apparatus for measuring the axial length of an eye. The invention, assigned to SVision Imaging, Ltd, utilizes optical imaging, specifically aligning an OCT optical focus with the ocular posterior segment, to acquire an image of the cornea and retina. From this image, anterior and posterior segment endpoints are determined, allowing for the calculation of the eye's axial length. This method is designed to provide accurate measurements even for patients with serious ophthalmic conditions.

This publication represents a new patent application and does not impose immediate regulatory obligations on companies. However, it is relevant for medical device manufacturers and researchers in the ophthalmology and medical imaging sectors. Companies developing or utilizing eye-measurement technologies should be aware of this patented approach, particularly if their products involve OCT imaging or axial length determination. No compliance actions are required at this stage, but it may influence future product development and intellectual property strategies.

Source document (simplified)

← EPO Patent Bulletin

METHOD AND APPARATUS FOR MEASURING AXIAL LENGTH OF EYE, AND COMPUTER DEVICE

Publication EP4710840A1 Kind: A1 Mar 18, 2026

Applicants

SVision Imaging, Ltd

Inventors

ZANG, Xuan, WANG, Jiayin, CHEN, Jun, WU, Zhilin

Abstract

The present application relates to a method and apparatus for measuring an axial length of an eye, and a computer device. The method comprises: acquiring an optical image on which an OCT optical focus is aligned with an ocular posterior segment of an eye under test, wherein the optical image comprises the cornea and the fovea of the retina of the eye under test; acquiring an anterior segment endpoint and a posterior segment endpoint of the eye under test according to the optical image; and determining the axial length of the eye under test according to the anterior segment endpoint and the posterior segment endpoint. According to the method, the anterior segment endpoint and the posterior segment endpoint of the eye under test are determined, so that the axial length can be determined according to the anterior segment endpoint and the posterior segment endpoint, that is, an optical image comprising a clear retina is acquired, so that the axial length is acquired according to the optical image comprising the clear retina, and the effect of accurately measuring the axial length can still be achieved for serious ophthalmic diseases.

IPC Classifications

A61B 3/10 20060101AFI20241213BHEP A61B 3/14 20060101ALI20241213BHEP A61B 3/00 20060101ALI20241213BHEP

Designated States

AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR

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