# US 2016/0249798 A1 · Automated perimeter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0249798 A1 - Document ID: US20160249798A1 - Status: Published application - Kind: A1 - Application number: 14/915,641 - Filed: 2014-09-02 - Published: 2016-09-01 - Earliest claimed: 2013-09-02 - Assignees: Ocuspecto Oy - Applicants: Ocuspecto Oy - Inventors: Tapio MANTYSALO; Markku LEINONEN - Web page: https://patentgrep.com/patent/US20160249798A1 ## CPC - A61B 3/024: for determining the visual field, e.g. perimeter types - A61B 3/0033: {characterised by user input arrangements} - A61B 3/0091: {Fixation targets for viewing direction} - A61B 3/022: {for testing contrast sensitivity} - A61B 3/028: for testing visual acuity; for determination of refraction, e.g. phoropters - A61B 3/032: Devices for presenting test symbols or characters, e.g. test chart projectors (A61B3/036 takes precedence) - A61B 3/063: {for testing light sensitivity, i.e. adaptation} - A61B 3/066: {for testing colour vision} - A61B 3/18: Arrangement of plural eye-testing or -examining apparatus - A61B 5/16: Devices for psychotechnics (using teaching or educational appliances G09B1/00 - G09B7/00); Testing reaction times {; Devices for evaluating the psychological state} - A61B 5/163: {by tracking eye movement, gaze, or pupil change} - A61B 5/7445: {Display arrangements, e.g. multiple display units} - G09B 7/00: Electrically-operated teaching apparatus or devices working with questions and answers (mechanically operated G09B3/00; computing arrangements G06F) - H04N 5/58: in dependence upon ambient light - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract The invention relates to a perimeter or a campimeter with a visible fixation point and a method used in them. The method comprises at least the following steps: producing a fixation point having a first visual appearance to be shown to a patient; producing a stimulus shown to the patient at a stimulus time-point at a pre-defined location; activating a response device by the patient upon noticing the stimulus at a response time-point; changing the fixation point to have a second visual appearance for a fixation point second visual appearance time interval near the stimulus time-point. ## Claims ### Claim 1 A method used in a standard automated perimetry (SAP) perimeter or campimeter with a visible fixation point, the method comprising at least the following steps: producing a fixation point (101) having a first visual appearance (101a) to be shown to a patient (100); producing a stimulus (105) shown to the patient at a stimulus time-point at a pre-defined location; activating a response device (103) by the patient upon noticing the stimulus at a response time-point; characterized in changing the fixation point to have a second visual appearance (101b) for a fixation point second visual appearance time interval near the stimulus time-point by starting the fixation point second visual appearance time interval not earlier than 1 second before the stimulus time-point; changing the fixation point back to have the first visual appearance (101a) after the fixation point second visual appearance time interval has ended or after patient has responded. ### Claim 2 (depends on 1) A method according to claim 1, characterized in that ambient light sensors (15) are used to adjust intensity i.e. luminance of the stimuli and fixation points during a test based on illumination of perimeter surface so that luminance contrast can be set at the desired level. ### Claim 3 (depends on 1) A method according to claim 1, characterized in starting the fixation point second visual appearance time interval less than 200 ms before the stimulus time-point or sometimes up to 1 second later, and/or ending the fixation point second visual appearance time interval not later than 2 seconds, typically 0.5 . . . 1 second, after the stimulus time-point, or after the fixation point second visual appearance is shown, or after patient has responded. ### Claim 4 (depends on 1) A method according to claim 1, characterized in recording whether the patient activates the response device during a response time interval or not. ### Claim 5 (depends on 1) A method according to claim 1, characterized in producing a second stimulus shown to the patient at a second stimulus time-point after a stimulus time interval from either the previous stimulus time-point or the previous response time-point. ### Claim 6 (depends on 5) A method according to claim 5, characterized in varying one or more of: the stimulus time interval light intensity of the stimulus stimulus size stimulus color stimulus location. ### Claim 7 (depends on 5) A method according to claim 5, characterized in varying the position of the fixation point shown to the patient. ### Claim 8 (depends on 1) A method according to claim 1, characterized in changing the fixation point to have a third visual appearance for a time interval near the stimulus time-point when the patient should not activate the response device even if he/she saw the stimulus. ### Claim 9 A standard automated perimetry (SAP) perimeter or campimeter with a visible fixation point comprising means for producing a fixation point (101) having a first visual appearance (101a) to be shown to a patient (100); means for producing a stimulus (105) shown to the patient at a stimulus time-point; a response device (103) adapted to be activated by the patient upon noticing the stimulus at a response time-point; characterized in that the means for producing a fixation point are arranged to change the fixation point to have a second visual appearance (101b) for a fixation point second visual appearance time interval near the stimulus time-point, starting the fixation point second visual appearance time interval not earlier than 1 second before the stimulus time-point; change the fixation point back to have the first visual appearance (101a) after the fixation point second visual appearance time interval has ended or after patient has responded. ### Claim 10 (depends on 9) A perimetry or a campimeter according to claim 9, characterized in that ambient light sensors (15) are used to adjust intensity i.e. luminance of the stimuli and fixation points during a test based on illumination of perimeter surface so that luminance contrast can be set at the desired level. ### Claim 11 (depends on 9) A stand-alone medical device (1) for testing a patient, which comprises in one-piece configuration: a first testing device comprising a perimeter surface (2) having a first side (3) to be viewed by the patient during testing and second side (4) not to be seen by the patient during testing, one or more second testing devices (5, 7) from the group of: a) a visual acuity measurement device to be viewed by the patient during testing of visual acuity, b) a contrast sensitivity testing device to be viewed by the patient during testing of contrast sensitivity, c) a glare testing device to be viewed by the patient during testing of glare, user interface device (7, 18) for controlling the use of the first and second testing devices, a perimeter or a campimeter according to claim 9.