Chart2020 is the only company to provide self-guided tests strategies for determining contrast sensitivity, visual acuity and stereo acuity. The simplicity of the ‘Yes/No’ answer strategy allows for pre-testing to be performed without the intervention of the doctor – the administrator need only capture whether the patient has provided the correct answer. They do this using either Chart2020’s 45 button infra-red remote or a mobile device. The complex algorithms working in the background ensure accurate results on the PDF report generated once the test is complete, which contains tabulated results combined with plotted graphs. These reports can be directly submitted to EMH/EMR systems.[/themestudio_title][vc_separator style=”shadow” border_width=”2″]
Chart2020 has many options for acuity testing. You can choose to use a standard logMAR chart, or our self-guided ETDRS or staircase methodologies. The section below contains information about the chart functions, optotype letter sets, notations, overlays and more. Please watch the quick demo on some of the features built into the acuity charts. For more information about the (e)ETDRS please click here to learn more.
- Low Vision
- Aviation BUMED spec
- Chart Editor (PRO)
- Combined Acuity + Astig (single chart)
- Sloan: English
- Sloan: Numbers
- Tumbling E
- Tumbling C
- Global: Japanese
- Global: Korean
- Global: Arabic
- Global: Russian
- Global: Hebrew
- Global: Greek
- Intelligent Randomize
- Crowding bars / definable
- Single letter
- Single line vertical
- Single line horizontal
- Triple line horizontal
- Line selection bar
- Reverse contrast
- Immediate alternate test distances
- User preferred LogMAR
- Imperial (feet)
Chart2020 revolutionizes contrast sensitivity testing by reducing test time, ensuring accuracy, allowing for anyone to administer the test, and providing detailed reports. It can be performed with either sine-wave gratings or various Sloan-compliant letter optotypes. The built in monitor luminance calibrator ensures accuracy and standardized results. Unlike some systems which require the patient be at a fixed distance from the screen, Chart2020 can be performed at varying distances.
Chart2020 is the only self-guided test available on the market. The simplicity of the ‘Yes|No’ answer strategy allows for pre-testing to be performed without the intervention of the doctor.
– the administrator need only capture whether the patient has provided the correct answer. They do this using either Chart2020’s 45 button infra-red remote or a mobile device. The test is easily administered, but complex algorithms are working in the background to ensure accurate results. Once the test is complete, a PDF containing tabulated results and a plotted graph of the patient’s contrast sensitivity for each eye and both eyes is generated. The graph is presented with an age-related normative overlay. These reports can be directly submitted to EMH/EMR systems.
The patient is presented with one target at a time, comprising either letters or sine-wave gratings. Because these targets are randomized, no two tests are the same. Based on the patient’s responses, the test administrator simply captures whether the patient has answered correctly by pressing Yes or No on the remote. The system saves time using a unique method of rapidly determining thresholds by first establishing the approximate level at each CPD using bigger jumps in contrast, before fine tuning to determine the precise level.
The sine-wave gratings test has two modes.
In the pairs test mode, two targets are displayed side by side; one target has no sine gratings, while the other target is displayed with vertical, horizontal, 35° or 135° sine gratings. The patient answers by indicating which target displays the sine-wave gratings. In this mode, the test can be self-administered by the patient, who presses the left or right arrow on the remote depending on their answer. This option assists in removing bias and reduces staff overhead.
In single test mode, the patient is shown only one sine grating target at various angles. The patient answers by indicating the angle of the sine-wave gratings.
The letter contrast test can use Sloan letters, numbers, pediatric symbols, and other Sloan compliant letter sets. The optotype size can be set to 2°, or 4° for low vision patients. This test has a quick-start option to rapidly determine thresholds, and a standard mode which goes through the various levels of decreasing contrast step by step.
Both test strategies can be performed with a user-set inter-target pause so that the previous image on the retina dissipates before the next image is presented.
Chart2020’s dual monitor option can be used to set up a mini-viewer doctor monitor separate to the patient monitor. The doctor monitor can either duplicate what is seen on the patient monitor or display the correct answers to the randomized questions presented to the patients. In this case, the test administrator can see either which target has the sine-wave gratings (pairs method) or the angle of the target (single method) shown to the patient.
Chart2020’s contrast sensitivity test can be used to assess patients with glaucoma, macular degeneration, diabetes, cataracts, and amblyopia and to help evaluate the need for various treatments including LASIK, refractive surgeries, and IOLs. The test is used worldwide because of its ease of administration, accuracy, and detailed reports which doctors can use to motivate for surgery and refractive treatments.[/ts_readmore]
- Fan with rotating selector
- Rotating block – variable angle
- Concentric / variable circles
- Synchronous fan to block axis refinement
- Cross cylinder
Chart2020’s visual acuity testing process reduces test time, ensures accuracy, and provides detailed reports. It can be performed with either the ETDRS protocol or the staircase approach. The test can be performed at varying distances from the screen.
Because the test can be administered by anyone, it can be used as a pre-test without the intervention of a medical professional. The report generated, which contains tabulated results combined with a uniquely designed plotted graph of the patient’s visual acuity range for each eye and both eyes, can then be used by the doctor or optometrist during consultation. These reports can be submitted directly to EMH|EMR systems.
Methodologies and Test Options
With the staircase methodology, the patient is presented with one letter at a time. Instead of the time-consuming process of testing each level of acuity, the system first determines the approximate VA by reducing letter size in big jumps and then fine tuning to determine the exact VA. The test administrator captures the patient’s responses by pressing Yes or No on the remote, using either Chart2020’s 45 button infra-red remote or a mobile device.
With the ETDRS method, the letters K, R, V, and D are used for the screening phase, followed by all the Sloan letters for the threshold phase. Each eye is tested separately and then together. The test can be performed with or without crowding bars, and can also be used with different letter sets such as pediatric, Sloan numbers or one of the global optotypes (Russian, Japanese, Korean, Arabic, Hebrew and Greek).
Because if its ease of administration, accurate graphical and tabulated reports, and hi-tech approach to testing, Chart2020’s Visual Acuity Wizard is used globally by doctors and optometrists seeking to use technology to improve their practices.
Chart2020’s stereo acuity test is unique, as it provides detailed and accurate reports with reduced testing time. It can also be used at varying distances from the screen rather than requiring the patient to be at a fixed distance. It can be used on a polarized monitor using circular polarization or a standard monitor using color separation.
Chart2020’s stereo acuity test is also revolutionary, because it can be administered by anyone as a pre-test, without the intervention of a doctor. The patient’s answers are captured using either Chart2020’s 45 button infra-red remote, or a mobile device. The simple ‘Yes|No’ method is used to capture correct and incorrect answers. The complex algorithms running in the background ensure accurate results on the PDF report generated once the test is complete. The report contains tabulated results and a plotted graph showing the patient’s stereo sensitivity for each eye and both eyes. The report can be handed to the doctor for analysis to aid in the examination of the patient. These reports can be directly submitted to EMH/EMR systems.
Chart2020’s stereo acuity test can be used to assess whether military personnel fulfil the requirements for stereo acuity, which is a minimum of 40 secs of arc.
There are three test types: shapes, poles, and random stereo dots. Test results are standardized because of the built in calibrators. The anaglyph calibrator syncs the colors of the anaglyphs to the colors that are emitted from the monitor. The luminance calibrator ensures precision luminance and color accuracy.
The patient is required to identify which object is closest to him. The targets are randomized so that each test is different. The administrator presses Yes on the remote if the patient’s answer is correct, and No if it is incorrect. The system first establishes the approximate level using bigger jumps in stereo acuity before fine tuning to determine the precise level. This method of rapidly determining thresholds is also a timesaver.
The shapes test presents four different geometric shapes at different secs of arc, and the patient needs to determine which object appears closest.
The three poles test shows three identical poles appearing at different levels of stereo and the patient needs to answer which is closest.
The random stereo dots test has two numbers hidden in the chart, which need to be identified by the patient.
Chart2020 can be set up with separate patient and doctor monitors. The doctor monitor can display what is being presented on the patient screen, or display the correct answers. In this case, the test administrator can see which target is closest to the patient. During the shapes test, the correct shape is written out on the doctor screen (circle, square, triangle, or diamond). In the poles test, the doctor screen states which pole is closest (left, right, or center). In the random stereo dots test the two numbers hidden in the image are shown on the doctor screen.
Chart2020’s stereo acuity test is used all over the world by doctors who want to save time while still generating quality reports that can be used to aid in patient examinations.[/ts_readmore]
- Horizontal coincidence (multiple)
- Vertical coincidence (multiple)
- Fixation disparity (multiple)
- Worth 4 dot
- 3 dot
- Duochrome balance
- Fixation (white) dot
- Dynamic fixation