Before getting started, we need to determine if your monitor is on the best setting to take this test online.

Sample Patch

The sample patch to the left should look like fuzzy gray bars. If it does, you are ready to take the test online FREE OF CHARGE!
Click here to begin your test...

If this sample patch to the left looks like sharp edged, crisp stripes, your monitor may not be on the best setting for taking the test online. At this time you may follow our simple instructions listed below to change your monitor settings, or have a CST Vision Screener sent to you in the mail.

To change your monitor to the best setting for taking the Online CST Vision Screener, follow these simple instructions.

PC users:

1. From the Start menu, select Settings then Control Panel.
2. In the Control Panel, select Display.
3. In the Display Properties dialog box, select the Settings tab.
4. In the Color Settings drop down menu, select True Color.

Mac users:

OS 9 users:
1. From the Apple menu, choose Control Panels.
2. Open the Monitors Control Panel.
3. Change your color settings to Millions of Colors.

OS X users:
1. From the Apple menu, choose System Preferences.
2. Choose the Displays Preference.
3. Choose Millions from the Color popup menu.

After you have finished changing your monitor settings,
click here to begin your test...

© 2002 Vision Sciences Research Corp. All rights reserved.
US Patents 5,500,699 5,414,479 5,552,842. Additional patents applied for.



This site is regularly updated. Please check back with us often. is brought to you by Vision Sciences Research Corporation, Walnut Creek, California.

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