My EyeGlass Numbers Look Very Different from My Last Rx. What Do I Do?

man user


man user

EyeQue Team

man user

September 26, 2019

Woman Thinking with eyeglasses looking at a laptop

EyeGlass Numbers are the results that you get from the EyeQue VisionCheck or Personal Vision Tracker. Once you complete a series of tests, you get a set of EyeGlass Numbers. EyeGlass Numbers use the same type of numbers and format as an eye prescription. You can compare your EyeGlass Numbers with your current eye prescription.

But what happens if your EyeGlass Numbers are quite different from your last eye prescription?

Know That Eye Prescriptions Can Vary

Here is a secret: there is no definitive set of numbers to correct your vision. If your EyeGlass Numbers vary by up to 0.5 diopters, your vision correction will fall in the 20/20 range. Optometrists generally consider agreement up to 0.5 diopters as acceptable. That means if you had your vision evaluated by several different Optometrists on the same day, you could receive as many slightly different prescriptions.

Different numbers for your EyeGlass Numbers and prescription? There are many reasons why.


If you have EyeGlass Numbers that vary more than this, it could be that your vision has changed enough to warrant a new set of glasses. You can even use your EGNs to order new glasses. It may also be a good time to schedule a visit to an eye doctor to see if anything else about your eyes or vision has changed. Using EyeQue devices helps you monitor vision changes between doctor’s visits.

Brush Up on How to Take Vision Tests

EyeGlass Numbers that vary more than 0.5 diopters may be the result of testing difficulties. You can always check out our VisionCheck Tips and Tricks Video OR our EyeQue Personal Vision Tracker: Tips and Troubleshooting Video to ensure that you are taking your vision tests as accurately as you can. Practice makes perfect, so try using Practice Sessions before taking full vision tests. This way, you can get used to using your EyeQue refractive device.

If you have more questions, you can read our FAQs section for some helpful answers here.

Contact Customer Support

Let’s say you have tried it all. You have read the FAQs, blog posts, watched the videos, and done the practice sessions.

This is where our customer service reps come in handy. We are always ready to listen to your questions and concerns when it comes to using our EyeQue devices. If you have a question, we have answers! You can contact us at Feel free to send us a note anytime.

Your Vision at Your Fingertips

With the VisionCheck you can test your vision from home and use the results to order glasses online. Updating your glasses has never been easier!

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