Vision Test Apparatus and System Patent

ChangeBridge: Patent Grants - Diagnosis & Surgery (A61B)

Published March 31st, 2026

Detected March 31st, 2026

Summary

USPTO granted patent US12588807B2 to EYEMIKAN BIOTECH INC. on March 31, 2026 for a vision test apparatus combining converging and diverging lenses to form virtual images for vision testing. The patent covers the optical system design and method for conducting vision assessments.

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What changed

USPTO granted patent US12588807B2 to EYEMIKAN BIOTECH INC. on March 31, 2026. The patent covers a vision test apparatus comprising a hollow housing containing a converging lens and a diverging lens with overlapping optical axes, where the diverging lens demagnifies test optotypes to form a first virtual image within the converging focal length, which is then magnified by the converging lens for vision testing. Five claims protect the dual-lens optical configuration and testing method.

Medical device manufacturers developing vision testing equipment and healthcare providers utilizing automated vision testing systems should review this patent for potential licensing requirements or freedom-to-operate considerations. No compliance deadlines or regulatory obligations are associated with this patent grant notice.

Source document (simplified)

← USPTO Patent Grants

Vision test apparatus, method and system and non-transient computer readable recording medium

Grant US12588807B2 Kind: B2 Mar 31, 2026

Assignee

EYEMIKAN BIOTECH INC.

Inventors

Ming-Fu Chen, Cheng-Hsiung Chen

Abstract

A vision test apparatus includes a hollow housing, a converging lens, and a diverging lens. The converging lens is arranged in the hollow housing, and includes a converging focal length. The diverging lens is arranged in the hollow housing at intervals relative to the converging lens, and includes a diverging focal length. Two optical axes of the diverging lens and the converging lens are overlap each other, and the diverging focal length partially overlaps the converging focal length. One end of the hollow housing adjacent to the diverging lens attaches a test optotype displayed by a display apparatus. The diverging lens demagnifies the test optotype to form a first virtual image within the converging focal length. The converging lens magnifies the first virtual image to form a second virtual image for a vision testing.

CPC Classifications

A61B 3/032 A61B 3/14 A61B 3/0025 A61B 3/028 A61B 3/036 A61B 3/1035 A61B 3/0008 A61B 3/024 A61B 3/005 A61B 3/08 A61B 3/132 G02B 9/10 G02B 9/14 G02B 9/58 G02B 13/003 G02B 13/0035 G02B 13/004 G02B 15/143505 G02B 15/144101