Published On: Fri, Sep 18th, 2020

What does a vision test consist of and how is it done?

The first step to getting your formula and glasses is getting a vision test. It is a very simple procedure by which your visual acuity is evaluated. In fact, it is so simple that both medical and technical professionals can do it.

However, it requires good knowledge and good technique. Otherwise, you would spend hours trying to find the right combination for your eyes. If you suspect you are having trouble seeing, what type of vision test is appropriate for you?

When is a vision test appropriate?

For starters, it’s good to know what the signs or signals are that you need for a vision test. These are:

  • If you need to strain your eyes to see some things, like when you squint.
  • If you constantly feel eye strain, red eyes, or burning eyes.
  • When you should zoom in or out on a book to read it.
  • When you suffer from constant headaches after reading or being in front of the computer.

If this happens to you or you see a sudden or very noticeable change in your eyesight, we recommend that you undergo this type of study. It is simple and does not take too long.

What happens during a vision test

The vision test is done with different materials. One of them is the eye chart. It is a surface where letters are displayed that are getting smaller from top to bottom. This is placed 20 feet away from where you will be sitting, and the specialist will ask you to read or say some of the letters aloud.

What they call 20/20 is a normal vision from 20 feet away. In this case, a person with 20/20 vision is able to read the table without problems at this distance. But, for example, if you can only read the first letter above the table and see nothing else, your vision is 20/200. In other words, at 20 feet you can read what a normal person would read at 200 feet.

In addition to the basic visual acuity exam, a comprehensive vision test  also includes:

  • An eye fundus, in which your pupils were dilated with drops and the doctor will look into your eyes with a lens
  • Tonometry, in which eye pressure is measured to rule out various types of glaucoma
  • Campimetry, which is simply an examination of the visual field, to assess the spatial limits of your vision

Together, these exams can rule out most vision abnormalities. It is a simple and fast process, so do not hesitate to contact a professional to have your vision exam in case of presenting any symptoms.

References :

  1. American Optometric Association

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