Doctor says that you should get checked your eyes yearly once. In modern lifestyle it is difficult to visit hospital often for eyes checkup. You can test your eyes using your computer.
Yes, using this computer online eyes checkup you can get to know your eyes vision how bad/good it is. Then you consult your doctor for more treatment if required.
The Snellen Eye Chart
Snellen Eye Chart
If you visited eye hospital for testing then you might aware of Snellen Chart that contains rows of alphabets of different sizes. Doctor asking you to read these letters from a distance, usually twenty feet, and the smallest row that you can recognize accurately indicates whether you have normal vision or not.
As i said various Eye testing tools that are available for testing your eyes online and based on same Snellen chart.
Test your Eye Online
Stat with you can test your eyesight online using University at Buffalo’s IVAC tool. Use a physical ruler to measure the length of the line on the screen (the length will vary depending on your screen resolution). Also measure the distance of your eyes from the computer screen. Now read the row of letters on the screen and press ‘smaller’ to display more rows in decreasing sizes.
While performing the test, you need to cover one eye and when you have read all the characters from top-to-bottom, read them again but cover the other eye this time. When you can no longer read the letters, stop!
Flash based eye testing tool thinkquest.org – This tool works best if you are using 15”, 17” or 19” in size screen. Stand four feet from the screen and then follow the on-screen instructions. When the characters are no longer readable, hit the stop button and it will display your visual acuity.
If want to check with more DIY solution, try this. Open the Snellen Chart image on your computer screen and measure the size of the big letter E using ruler(You can use IE toolbar). Multiply that number by 2.838 and stand that far from the screen while taking the test. Now try reading the different letters, top to bottom, to check your vision.