• - Fast Domestic & International Delivery*
    • - Online Order Tracking + Secure Service with Leading Delivery Companies
    • - FREE SHIPPING for orders over $AU99
    • More Info >
    • - Full Refund & Exchanges Within 100 Days
    • - 2 Year Warranty on ALL Sunglasses & Eyeglasses
    • - 2 Year Warranty on ALL Prescription Eyewear
    • - 3 Month Warranty on ALL Contact Lenses
    • More Info >
    • - Claim rebate on prescription sunglasses, prescription eyeglasses or contact lenses
    • - Vision Direct is a recognized online optical provider by Medibank and Bupa
    • - Click for more info about our health fund partners
    • More Info >
    • We offer free basic 1.5 index lenses on all prescription eyeglasses. We provide opportunities to upgrade and add features during checkout. We make shopping online for your glasses simple, efficient and safe.
TOLL FREE 1-800-958-277
  • - Available Mon-Fri, from 9AM - 6PM AEST
Contact Lenses | Optical Centre VisionDirect AU

Are Contact Lenses and Glasses Prescription The Same?

One of the most frequently asked questions is that are contact lenses and glasses prescription the same?

Simple, they are not!

The main reason for this is that glasses prescription are positioned approximately 12 millimeters from your eyes whereas contact lenses sit directly on your eyes.

You can compare this to holding a magnifying glass at different distances.

If you hold the lenses at an arm’s length and focus on an object, what you see is very different to when you hold it right up to your eye.

Glasses prescriptions

During an eye exam for glasses, the optician will determine your glasses prescription with lenses that sit at a specific distance from your eyes and under the assumption that your glasses lenses will also sit at the same distance.

A range of information is assessed, including your lens power (known as ‘SPH’), which is required to correct an eye refractive error.

This is the cause of nearsightedness (myopia) and farsightedness (hyperopia). The amount of correction required to correct a refractive error is measured in diopters (often abbreviated to ‘D’). 

For specific eye conditions such as astigmatism, the AXIS is required – this is a measurement of the cylindricity of the lenses, which will compensate for a non-spherical cornea - the cause of astigmatism.

For specific types of lenses, such as bifocal lenses, your glasses prescription will also include an ‘ADDITION’ and ‘DOMINANT’ (also known as ADD) measurement which refers to the magnifying power needed to correct presbyopia.

Presbyopia is a very common condition which develops as you get older and it affects the ability of your eyes to adjust in order to see objects clearly at different distances.

Contact lens prescriptions

With an eye exam for contact lenses, all of this information is still needed, but a contact lens prescription will contain additional information such as the base curve (the curvature of the lenses in millimeters), the diameter of the lenses in millimeters, the lens brand and the expiration date.

When your glasses are not for visual correction (i.e. for aesthetic purposes), you don’t necessarily need a glasses prescription.

This is not the case for contact lenses.

You must have a contact lens prescription even if you are buying lenses which offer no visual correction, such as colored contacts for special effects.

Contact lenses are a medical device and they are not suitable for everyone, so be sure to speak with a specialist to assess which option - and prescription - will be better suited for you. 

It is worth noting that the lens power for your glasses and contact lens prescription may differ, but this is more likely to be the case when you have a prescription of under -4.00D, which means it does not apply to everyone.

Following an eye exam, your optician is legally required to provide a copy of your glasses or contact lens prescription.

If you are aged between 18 and 60, we would recommend a thorough eye exam every two years and once a year if you are over 60.

Check out our guide for more information on your eye prescription and also how to read the results. You can also ask one of our expert opticians for more information!


Was this article helpful? Thanks for your feedback!

Sign up for a free, exclusive membership

Sign in with Facebook

Exclusive Features

  • Order Tracking
  • Easy Re-Order
  • Saved Prescriptions
  • Express Checkout
  • Exclusive Discounts and Sales
By joining VisionDirect you agree to the Terms & Conditions

Sign up for a free, exclusive membership

What is your gender?

When is your Birthday?

Sign up for a free, exclusive membership

What is your gender?

When is your Birthday?

Subscribe to our Newsletter
By joining VisionDirect you agree to the Terms & Conditions


You are all set!
Visit Membership

Forgot Password

Please enter your email below. We'll send you a link to reset your password.
Send E-Mail

Having trouble?

Don't hesitate to Contact us

Forgot Password

We've sent an email with instructions on how to reset your password.

If you don't receive instructions within a few minutes, check your email's spam and junk filters.

Having trouble?

Don't hesitate to Contact us

Reset Password

Password must be at least 8 characters.
Save and Sign In

Having trouble?

Don't hesitate to Contact us


Get personalized eyewear recommendations with our style finder and find the perfect pair for you.

Are you shopping for a…



Vision Direct Australia Coupons on tjoos.com.au