Help Center

If you are having trouble using MyVisionTest, then you have come to the right place. Listed below are solutions to common problems. We have a tutorial that teaches how to use MyVisionTest. If you are unable to get the vision test to launch, use the troubleshooter to help track down the cause. If you are unable to find the answer to your question here, then please contact us.

Vision Test Issues: Video Static Test

Vision Test Issues: Macular Mapping Test

Vision Test Results Questions

General Java and Browser Plug-in Issues

Web Site Issues

Browser Plug-in and Web Start Issues

After clicking the "Launch Vision Test" link nothing happens

There are several possible reasons this may occur:

  • Java is not installed on you computer.
    Most internet browsers will alert you to the fact that a missing plug-in is required to load the vision test, and depending upon your browser, may offer to install Java on your computer. However, it is also possible that you will be giving little guidance as to why the page failed to load properly.

    If you are uncertian whether Java is installed on your computer, or whether it is an up-to-date version, please take a moment to use our troubleshooter to test your system. If you wish to download and install the latest version of Java, here is a link: Get Java now.

  • The vision test is being slowly downloaded to your computer.
    The vision test file must be downloaded to your computer before the page will load. The vision test file will take approximately 30 seconds to download over a 56K dial-up connection. If you have a slow, poor-quality connection to our site, it could take even longer.

  • Your browser has become unresponsive.
    Occasionally your web browser may fail to properly load the MyVisionTest program. This seems to be a sporatic, random occurance. If you browser seems to have locked up while loading the vision test, please close your browser, reopen it, and try again.

I have Java installed, but the vision test still does not work

There are several possible reasons for this. The most common problems are listed below:

  1. Please note that it may take several seconds for the vision test to load. The vision test file is 250KB in size, and will take approximately 30 seconds to download on a 56K dial-up connection.

  2. If your browser displays a light blue box with an 'X' in the top left corner, then your browser was unable to find and load the vision test file. Please try agin.

  3. If your browser froze-up (became unresponsive) after clicking on the "Launch Vision Test" link, then read this item

  4. Installed Java version is too old. MyVisionTest requires Java version 1.4 or later. (Download the latest version of Java now)

  5. Your web browser is too old. (Get free updates for Internet Explorer or Firefox)

  6. Java is not properly configured to work with your web browser. Please use the Java tester available here to check out your Java installation.

    • If the Java tester detects errors in your Java installation, please consult this page for assistance with fixing Internet Explorer problems, or this page for Firefox problems.

    • If the Java tester does NOT detect a problem with your Java installation, please use our troubleshooter to test your system for compatibility with MyVisionTest, then contact me with your operating system, browser, troubleshooter results and any other information that you think may assist me in tracking down the source of your difficulty.

My web browser crashes after I click the "Launch Vision Test" link

Occasionally your web browser may fail to properly load the MyVisionTest applet after clicking the 'Launch Vision Test' link. Typically under these conditions, the web browser will display a blank screen and will be totally unresponsive.

Should your browser become unresponsive when attempting to load the vision test, you should close the browser, restart it, and then attempt to load the vision test once again.

Please note, it is normal for the vision test to take several seconds to load after clicking on the link. During this time, the browser may appear to be nonresponsive. If you have a slow, poor-quality internet connection, please wait at least 30 seconds for the vision test to load prior to closing your browser and restarting.

What is Java and why do I need to install it?

Java is the computer programming language that was used to make the vision test. You must have Java installed on your computer in order to run the vision test. Java comes already installed on many computers, but it is not part of the standard installation of Microsoft Windows.

Java is platform-independent, meaning software produced with it (such as MyVisionTest) can run on ANY computer if Java support has been installed. Unfortunately, many computers do not come from the factory with Java support already installed. So, to run Java programs you must first install Java yourself.

Java is free. You can download Java for most operating systems (including Microsoft Windows) from Sun, the company that makes Java. If you use Apple computers you can download Java support directly from Apple.

Web Site Issues

I did not recieve a confirmation email after filling out the registration form

After submitting the registration form a confirmation message is sent to the email address that you provide. This message contains an activation link that you must click to activate your account. You cannot use our online services until your account is activated.

You should receive the email message within a few moments of submitting the registration form. Because some email providers have very aggressive spam filters, it is possible that our confirmation email was delivered to your "Junk Email" or "Spam" email box, or they may failed to be delivered at all. If you do not receive our confirmation email within a few minutes of completing the form, you can have it sent again, or you are welcome to contact us and we will manually activate your account. Be certian to add to your address book or list of addresses that you want to accept email messages from so you will receive future messages from us.

I cannot log into the web site

Before you can log into, you need to register with us. Then, you need to activate your account by clicking on the link contained in the email that we send to you, or manually activate it on the Membership Activation page using the activation number contained the email. This confirms that the email address that you provided is valid and belongs to you. After you have activated your account you can log into using your email address and the password you selected.

If you have problems logging in after following the above procedure, please visit our log-in help page for assistance.

Where can I download a copy of the Amsler grid?

You may download a copy of the Amsler grid on this page.

Vision Test Issues

I cannot find the Delete Defect button to delete my drawings.

After drawing a red spot to mark the size and location of a vision defect, you may decide to delete it if you decide it is unsatifactory. There is a "Delete Defect" button on the far right side of the toolbar at the top of the vision test screen for this purpose. If, however, your computer monitor is too small and/or your screen resolution is too low, you may not see this button.

To delete a defect without using the "Delete Defect" button, right-click on the vision test screen and select "Delete Defect".

The blinking yellow/green spot is distracting. I cannot make it disappear.

The blinking yellow/green spot is designed to disappear when it is covered by your normal blind spot. If you are positioned 14-16 inches from the computer monitor, your normal blind spot will be located about 4-6 inches from the center of the screen. It is located to the right side when testing the right eye, and to the left when testing the left eye. For more information, and a practice test to help you find your blind spot, visit Blind Spot on Wikipedia.

There are several possible reasons that you cannot make the blind spot monitor disappear:

  • Your blind spot is too small.
    Blind spot size varies from one person to the next, and if you happen to have a particularly small blind spot it will be unable to completely cover the blinking yellow/green spot.

  • You are too close or too far from the computer monitor.
    In order to make your blind spot cover the blinking yellow/green spot while you stare at the central blue spot, you must be the correct distance from the computer monitor. This distance will vary from one person to the next, but is usually 14-16 inches. To find the correct distance, start with your face very close to the screen (less than 6 inches), then slowly move away. If you get more than 24 inches away from the screen and the spot has still not disappeared, try again. If after repeated attempts you have still not been able to make it disappear, then one of the other possible causes listed here may apply.

  • You are looking away from the blue spot.
    The blinking yellow/green spot will only remain invisible while you are staring at the blue spot in the center of the vision test screen. The moment you look away from the blue spot, the blinking spot with become visible. One of the purposes of the blinking spot is to help remind you to not look away from the blue spot.

If you cannot make the blind spot monitor disappear, you may turn it off by clicking on the "Blind Spot" button at the top of the vision test screen. After turning the blind spot monitor off, you will have to make an effort to position yourself the same distance from the screen every time you use the test. This is important because if you vary your distance from the computer monitor it may significantly affect your test results. If you make an effort to position yourself more-or-less the same distance from the monitor every time you use the test, then you do not need to use the blind spot monitor.

I cannot see the blind spot monitor.

The blind spot monitor is a blinking yellow/green spot that appears on the left or right side of the vision test screen, depending upon which eye is being tested. There are two possible reasons that may prevent you from seeing the blind spot monitor:

  • The blind spot monitor has been turned off.
    The blind spot monitor can be toggled on/off using the "Blind Spot" button at the top of the vision test screen. This setting is remembered from one test session to the next, so that if you turn it off, the next time you use the test it will still be turned off. If the blind spot button says "ON", and you still do not see the blinking spot, then it is probably being displayed off-screen (see below).

  • Your computer monitor is too small and/or your screen resolution is too low.
    The blind spot monitor is located a specific distance from the center of the vision test screen. If your computer monitor is too small, or if your screen resolution is too low, then the blind spot monitor will be located beyond the viewable area of your monitor.

Blind spot monitoring is not essential to the working of the test. It's primary purpose is to help assure that you are the same distance from the screen every time you use the test. This is important because if you vary your distance from the computer monitor it may significantly affect your test results. If you make an effort to position yourself more-or-less the same distance from the monitor every time you use the test, then you do not need to use the blind spot monitor.

I have a vision defect on Amsler grid that I am unable to see on MyVisionTest

There are several possible reasons that you may be having difficulty seeing your defects on MyVisionTest:

  • Do not take your eye away from the central blue dot while performing the test.

  • You need to wear the same eyeglasses that you wear while reading or viewing the Amsler grid when using MyVisionTest. Also, don't forget to cover one eye while performing the vision test.

  • You may be too far away from the computer screen. The distance that you view the test is important. I recommend 12-16 inches (closer being better). Consider the distance that you hold the Amsler, then try to match that distance when using MyVisionTest. It is important to use the same viewing distance every time you perform the vision test.

  • Defects on MyVisionTest look different than defects on Amsler. Appearance varies, but most people report seeing "motionless" areas, sometimes appearing grey, cloudy, or otherwise different. Some people have reported that blinking your eye helps to make the defect more noticable. Others have reported that viewing the test alternately with the left and right eyes can help make subtle defects more apparent (eg. using you hand to cover the left eye, then moving your hand to cover the right eye, then moving it back in front of the left eye several times.)

My vision defect runs off the edge of the screen, so I cannot draw it with the cursor.

If part of your vision defect falls outside the area covered by the vision test, you can draw a red spot in the center of the vision test screen then drag it into the correct position.

It is possible to drag a red spot partially off the screen, so that it matches the appearance of your vision defect. To drag a red spot just click on it, drag the red spot into the correct position while holding down your mouse button, then release the mouse button once you have the red spot where you want it. If you find that you have drawn the red spot too big or too small relative to your vision defect, click the delete button and try again.

Can I use the vision test without connecting to the internet?

Yes and No.

With the original version (version 1.0) of MyVisionTest, you can use the vision test in Offline Mode. The vision test can be downloaded to your hard drive and run at any time, with or without an internet connection. In Offline mode, you can test your vision but are unable to record or save your results. To start the test in Offline Mode, use either the Desktop or Start menu shortcuts that were created during installation, or double-click the VisionTest.jar file. See this page for more information. Please note: this version of MyVisionTest is no longer being actively developed. While it is fully compatible with version 2.0 of MyVisionTest, it may not be compatible with future releases. No enhancements or bug fixes are planned for this version of the program.

The current version of MyVisionTest requires that you be connected to The vision test can only be used within a web browser, and only while logged into our web site. These changes were made necessary because of technical issues associated with running desktop Java applications. Many users have great difficulty installing and configuring the free-standing desktop version of MyVisionTest, so we abandoned that approach in favor of the current web applet design.

Is it normal for the vision test screen to flicker?

Flickering of the vision test is a known issue on certain laptop computer video displays. This appears to be an issue related to the slower refresh rate of these displays. It is recommended that you use a video monitor with a refresh rate of at least 70Hz to avoid screen flicker.

I am unable to record my vision defects

Normally, after drawing a vision defect on the screen with the mouse cursor, a red spot will mark the location of the vision defect. However, a red spot will fail to appear if anything interferes with the ability of the vision test to communicate with our server. This is usually due to a firewall or proxy located between your computer and the internet.

It may be possible to set permissions on your firewall to allow communication with (IP address: If you are located in an institutional setting, you will need to consult your network administrator about making this change.

I press the arrow keys but nothing happens.

Every time you press a key on the keyboard, the key you pressed should appear in the in the immediate feedback area, located in the bottom right-hand corner of the test screen (see the tutorial for detailed information about the test screen).

If you press a key and the program does not respond, it may be because you have clicked your mouse outside of the test screen. In order for the vision test to register your keystrokes it must have "focus." To return focus to the vision test, click your mouse once anywhere within the vision test screen, such as in the middle of the wagon wheel.

You may confirm the the program is now registering your key strokes by pressing any key and noting the response in the immediate feedback area.

Sometimes I hear a beep but no letter appears.

The vision test checks the reliability of your responses in 2 ways: whether you will respond correctly more than once to the same stimulus (false negative catch trial), and whether you will respond to a beep alone (false positive catch trial).

You should only press a key if you actually see a letter. If you know which direction it was pointing, press the corresponding arrow key. If you could not tell the direction, press the spacebar.

If you hear a beep but do not see a letter, do nothing. Any response to a beep only will count as a false positive response, and will diminish the reliability of your test results.

Vision Test Results Questions

What does the "Defect Size" number mean?

The total number of pixels that each vision defect covers on the computer monitor is measured at the time the defect is recorded. This number is referred to as the Defect Size. Defect size is not displayed by default in the Results Viewer, but can be displayed by selecting the Show Defect Size button on the Detailed View page. Selecting this button will reveal the defect size in white text overlying each red defect. The sum of all defect sizes for each eye is displayed as the Total Size on the Summary View results page.

More information on understanding your results is available on the Interpreting Results page.

I use Internet Explorer and cannot view my MVT vision test results.

We use SVG images to display your MVT vision test results. Internet Explorer does not by default render SVG images, but can do so with the aid of a free plugin. You may use the below link to download the plugin, which is less than 1MB is size.

Download RENESIS now

Please visit this page for detailed instructions on how to download and install the free RENESIS plugin for Internet Explorer.

NOTE: Most other browsers - including Firefox and Safari - display SVG images without difficulty right out of the box. Please consider upgrading to one of these superior browsers.

Firefox 3

Learn more about SVG (Scalable Vector Graphics) on Wikipedia