Understanding your prescription


 Trying to figure out what all the weird data is on your glasses prescription, let alone having the confidence that you're getting it right when you enter it into your order is probably the scariest part for most people when they try to order glasses online for the first time!

But before we continue, don't forget - our 60 day 100% money back guarantee totally covers you for incorrect prescriptions - even if it's totally your fault! So relax it's not all that hard!


Do I need a prescription and where do I get it from?

Yes you do. Without having your prescription you will be unable to buy glasses as there's no other way to know what lenses you will need. The place to get it from is your Optometrist.

Just make sure you ask for a copy of your prescription at the end of the process. It's your own personal information and you'll be almost certainly paying for the eye test so you won't have any difficulty obtaining it.

If you have already had an eye test but didn't get a copy of your prescription at the time, the easiest way to get a copy is just flick your Optometrist an email and request it. You shouldn't pay any extra to obtain a copy.

What if my prescription is more than two years old?

It is recommended that a glasses prescription is less than two years old however this is not a legal requirement and we do not enforce it. If you wish to purchase glasses from us using a prescription older than two years then that is your decision and we will supply your glasses.

 How do I provide my prescription?

You will be able to upload this as part of the lenses selection process. Provided you have it as a PDF or image file. If you have a paper copy only, just take a photo of it and upload this photo!


This will ensure we get exactly the right details and if we have any questions we'll contact you to clarify before we process your order.


What does the information mean in a prescription?

What can sometimes be confusing is that prescriptions can be written is several different formats. So we've provided three examples below of the most common formats to help you how to enter the necessary details into your order.

Example One.

Probably the most common layout. Really easy to read and understand. This example has no details for anything other than Sphere, Cylinder & Axis. This is a very typical single vision prescription. If your prescription has more details than this eg Add, Prism etc, then it's most likely we would not be able to provide glasses for you as we only offer single vision glasses. See further down this page for more on these additional prescription details.


Example Two.

 This is a slightly more complex format but still very easy to understand. The Sphere and Cylinder measurements are very obvious but the Axis (90) has been written out to the side. Also the PD has been entered 'per eye' rather than as a single number so they need to be added together to be entered as '66'. 

Example Three. 

This example shows a prescription that is formatted horizontally rather than vertically, and it's also handwritten which is not uncommon still. This example is also missing the PD measurement. For some reason the PD is sometimes not included on a prescription. If yours is not included, you will still need to get this but it's really easy to do yourself. Check out this separate article about how to measure your PD

What about the other measurements?
Here's the most common additional measurements:

Add. This is the additional sphere or power measurement used for progressive or bifocal glasses. It may be shown as Near or NV or could even be Int. Add. If you want progressive glasses, make sure you select this during the lenses selection process.

Prism. This is an additional correction that is sometimes used to correct more complex vision issues such as double vision. The Base measurement usually accompanies this as well. Unfortunately we are unable to provide glasses with prism correction.

I have a very high prescription, can you supply this?
We can only supply glasses to a maximum of plus or minus ( + / - ) 6.00 sphere, and cylinder up to minus 4.00. If your prescription falls outside these ranges then we're sorry but we will be unable to supply you.

I have two separate PD measurements on my prescription but you only have input for one. What can I do?
If you have two separate PD measurements, just add them both together and then select the correct value from the dropdown menu. If you have a 0.5 number even after adding them both together, round up to the nearest whole number.

Still confused?
If the whole prescription thing is total gobbledegook to you, please don't hesitate to send us a copy of your prescription and we'll very quickly be able to point you in the right direction! You can email it to us at sales@ezyglasses.co.nz or just attach it to the chat message. 

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