# US 12,599,301 B2 · System for conducting eye examinations for visual acuity > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,599,301 B2 - Document ID: US12599301B2 - Status: Granted - Kind: B2 - Application number: 18/390,315 - Filed: 2023-12-20 - Published: 2025-06-26 - Granted: 2026-04-14 - Earliest claimed: 2023-12-20 - Assignees: Verily Life Sciences LLC - Applicants: Verily Life Sciences LLC - Inventors: Jeremy Chan; Supriyo Sinha - Web page: https://patentgrep.com/patent/US12599301B2 ## CPC - A61B 3/032: Devices for presenting test symbols or characters, e.g. test chart projectors (A61B3/036 takes precedence) - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - A61B 3/005: {Constructional features of the display} - A61B 3/14: Arrangements specially adapted for eye photography - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Systems, devices, and methods for conducting an eye examination for visual acuity are provided. In one example, a system may include an optical subsystem positioned in front of one or both eyes of a user. The optical subsystem may comprise a handheld device or a head worn device, a visual indicator, and a plurality of vision modifiers. The system may determine a distance between the optical subsystem and the display based on comparing a fixed size of the visual indicator to a detected size of the visual indicator in an image obtained by a camera. The system may output an eye examination image for visual acuity based on the distance being within a valid range. The eye examination image may include a visual stimulus having an output size determined based on the distance. The system may receive an input from the user indicating a selection of the visual stimulus. ## Claims ### Claim 1 A system for conducting an eye examination for visual acuity, comprising: an optical subsystem configured to be positioned in front of one or both eyes of a user, the optical subsystem comprising i) a handheld device or ii) a head worn device, a visual indicator having a fixed size, and a plurality of vision modifiers configured to modify vision of the user; a camera; a display; and one or more processors configured by instructions stored in memory to: determine, via the camera, a distance between the optical subsystem and the display, the distance determined based on comparing the fixed size of the visual indicator to a detected size of the visual indicator in an image obtained by the camera; output, via the display, an eye examination image for testing visual acuity based on the distance being within a valid range, the eye examination image including a visual stimulus having an output size determined based on the distance; and receive an input from the user indicating a selection of the visual stimulus. ### Claim 2 (depends on 1) The system of claim 1, wherein the one or more processors are further configured by instructions stored in memory to: determine, via the camera, a selection of a vision modifier of the plurality of vision modifiers. ### Claim 3 (depends on 1) The system of claim 1, wherein the one or more processors are further configured by instructions stored in memory to: output, via the display, the eye examination image based on a selection of a vision modifier of the plurality of vision modifiers. ### Claim 4 (depends on 1) The system of claim 1, wherein the one or more processors are further configured by instructions stored in memory to: transmit, to the optical subsystem, a selection of a vision modifier of the plurality of vision modifiers for conducting the eye examination. ### Claim 5 (depends on 1) The system of claim 1, wherein the optical subsystem selects a vision modifier of the plurality of vision modifiers based on a transmission that is received from a device that includes the display. ### Claim 6 (depends on 1) The system of claim 1, wherein the visual indicator comprises an anatomic feature of the user. ### Claim 7 (depends on 1) The system of claim 1, wherein the visual indicator comprises a code that indicates a selection of a vision modifier of the plurality of vision modifiers. ### Claim 8 (depends on 1) The system of claim 1, further comprising: an input device configured to receive the input from the user, wherein the input device comprises at least one of a microphone, a touchscreen, an air mouse, or a laser device. ### Claim 9 (depends on 1) The system of claim 1, wherein the plurality of vision modifiers includes a pinhole occluder and a lens configured to simulate distance vision. ### Claim 10 (depends on 1) The system of claim 1, wherein the plurality of vision modifiers includes a plurality of lenses configured to simulate vision at different distances. ### Claim 11 (depends on 1) The system of claim 1, wherein the plurality of vision modifiers includes a filter configured to filter light to one or both eyes of the user. ### Claim 12 (depends on 1) The system of claim 1, wherein the plurality of vision modifiers includes a pass through selection that enables unmodified vision of the user. ### Claim 13 (depends on 1) The system of claim 1, wherein the eye examination image is configured for testing at least one of distance acuity, pinhole acuity, or near visual acuity. ### Claim 14 (depends on 1) The system of claim 1, wherein the handheld device is configured to rotate a wheel to select between vision modifiers of the plurality of vision modifiers for one or both eyes of the user. ### Claim 15 (depends on 1) The system of claim 1, wherein the head worn device is configured to slide a vision modifier along a track to select between vision modifiers of the plurality of vision modifiers for one or both eyes of the user. ### Claim 16 (depends on 1) The system of claim 1, wherein the camera, the display, and the one or more processors are integrated in smartphone, tablet, or laptop computer. ### Claim 17 (depends on 1) The system of claim 1, wherein the one or more processors are further configured by instructions stored in memory to: determine the distance is greater than or less than the valid range; and output, via at least one of a speaker or the display, an indication to the user to change the distance to within the valid range. ### Claim 18 (depends on 1) The system of claim 1, wherein the handheld device or the head worn device is adapted to block vision of a first eye of the user while aligning a selectable one of the plurality of vision modifiers in front of a second eye of the user. ### Claim 19 (depends on 18) The system of claim 18, wherein the visual indicator is disposed on the handheld device or the head worn device and positioned in front of the first eye having blocked vision. ### Claim 20 A method for conducting an eye examination for visual acuity, comprising: determining, via a camera, a distance between an optical subsystem and a display, the optical subsystem configured to be positioned in front of one or both eyes of a user, the optical subsystem comprising I) a handheld device or ii) a head worn device, a visual indicator having a fixed size, and a plurality of vision modifiers configured to modify vision of the user, the distance determined based on comparing the fixed size of the visual indicator to a detected size of the visual indicator in an image obtained by the camera; outputting, via the display, an eye examination image for testing visual acuity based on the distance being within a valid range, the eye examination image including a visual stimulus having an output size determined based on the distance; and receiving an input from the user indicating a selection of the visual stimulus. ### Claim 21 (depends on 20) The method of claim 20, further comprising: determining, via the camera, at least one of a color or a quick response (QR) code corresponding to a selection of a vision modifier of the plurality of vision modifiers. ### Claim 22 (depends on 20) The method of claim 20, further comprising: stopping, via the display, output of the eye examination image based on the distance being greater than or less than the valid range.