Most eye care doctors use vision screener machinery to test for the visual acuity of their patients. Many different machines exist to test for this, and give results in different ways. Here is a little info on how they are used and what exactly they do.
The most popular model has been used for just over 80 years, and the company that created it was responsible for some of the first testing and research in the vision field. It test in reflective light, as most other models use backlit areas that are harder to see for some people. It also is able to accommodate people who wear glasses with a progressive lens, whereas some other models require those glasses to be removed.
Most machines allow for your eyes to be anywhere from 16 to 20 inches away from the screen to test. There are 9 tests that are generally given with these machines, to measure your acuity. Some that are included would be night and peripheral testing with LED white lights to help with distinction.
When you take this kind of test, you will put your forehead against a lever at the very top of a machine. Then you will see different colors or signs and will be asked what you can see. The person giving you the test will keep track of your answers so that they can determine what visual needs you have.
Your doctor is then given your results so that they can help figure out what glasses you might need. Some people have found out they are color blind while taking this test. Other people have found that they cannot see far away or up close while taking this, and glasses are able to help.
The most popular model has been used for just over 80 years, and the company that created it was responsible for some of the first testing and research in the vision field. It test in reflective light, as most other models use backlit areas that are harder to see for some people. It also is able to accommodate people who wear glasses with a progressive lens, whereas some other models require those glasses to be removed.
Most machines allow for your eyes to be anywhere from 16 to 20 inches away from the screen to test. There are 9 tests that are generally given with these machines, to measure your acuity. Some that are included would be night and peripheral testing with LED white lights to help with distinction.
When you take this kind of test, you will put your forehead against a lever at the very top of a machine. Then you will see different colors or signs and will be asked what you can see. The person giving you the test will keep track of your answers so that they can determine what visual needs you have.
Your doctor is then given your results so that they can help figure out what glasses you might need. Some people have found out they are color blind while taking this test. Other people have found that they cannot see far away or up close while taking this, and glasses are able to help.
No comments:
Post a Comment